I leave you the best Kant's phrases , A philosopher born in Prussia, considered one of the great thinkers of philosophy, precursor of German idealism and representative of criticism.
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1-"Science is organized knowledge, wisdom is organized life."
2-"Always recognize that human individuals are ends, and do not use them as instruments for your purpose."
3-"There is no doubt that all our knowledge begins with experience"
4-"Thoughts without content are empty, intuitions without concept are blind. "
5-"Live your life as if the maximum of your actions were to become universal law."
6-"It is not God's will simply to be happy, but to make ourselves happy."
7-"If man makes himself a worm he should not complain when trampled."
8-"Morality is not the doctrine of how we make ourselves happy, but how we become deserving of happiness."
9-"A categorical imperative would be one that would represent an action as objectively necessary in itself, without reference to any other purpose."
10-"Do not persecute the favor of the multitude, it is rarely moved by honest and legal means; But look for the testimony of a few and do not count voices, bashful."
11. The only objects of practical reason are those of good and evil, since the former is an object necessarily desired according to the principle of reason; While the second is necessarily rejected also according to the principle of reason."
12-"Happiness is not an ideal of reason, but of the imagination."
13-"All the interests of my reason, speculative and practical are combined in the following three questions: What can I know? What should I do? What can I expect?"
14-"In the law a man is guilty when he violates the rights of another, in ethics he is guilty only by thinking to do it."
15-"Live your life as if each of your actions were to become universal law."
16-"I had to eliminate knowledge to make room for belief."
17-"He who is evil with animals also becomes rough in his dealings with men. We can judge the heart of a man by his treatment of animals."
18-"To be is to do."
19-"It is not necessary that as long as I live, live happy but if it is necessary that as long as I live, I must live honorably."
20-"Even philosophers will praise war as an ennobling for humanity, forgetting the Greeks who said: evil is the war that engenders more evil than it eliminates."
21-"Two things fill the mind with increasing astonishment and admiration, more and more frequently and intensely my thoughts are drawn to them: the starry sky above me and the moral law within me. I do not pursue or conjecture any of them as if they were veiled or extravagant darkness beyond the horizon of my vision; I see them in front of me and I immediately connect with the awareness of my existence. "
22-"Experience without theory is blind, but theory without experience is simple intellectual play."
23-"Immaturity is the inability to use one's intelligence without the guidance of another."
24-"Metaphysics is a dark ocean without coasts or lighthouses, strewn with many philosophical ruins."
25-"We are not rich for what we have but for that without which we can not live."
26-"Look closely, how beautiful can be small."
27-"In every department of physical science, there is as much of science as of mathematics."
28-"The busier we are, the more keenly we feel what we live, the more we are aware of life."
29-"The death of dogma is the birth of morality."
30-"Space and time are the framework within which the mind is pressed to construct its experience of reality."
31-"Genius is the ability to understand and come independently to concepts that would normally have to be taught by another person."
32"Act in such a way that you treat humanity, whether in your own person or in the person of someone else, never only as a means to an end, but always as an end."
33-"Enlightenment is the liberation of man from his self-induced immaturity."
34-"Have courage to use your own reason! That is the motto of enlightenment."
35-"For peace to reign on Earth, humans must evolve into new beings who have learned to see the whole first."
36-"All our knowledge begins with the senses, then proceeds to the understanding and ends with reason. There is nothing higher than reason."
37."Where the beautiful is limited, the sublime is unlimited, so that the mind in the presence of the sublime, trying to imagine what it can not, has pain in failure but pleasure in contemplating the immensity of intent."
38-"Of the twisted wood of mankind, nothing has been done."
39-"Laziness and cowardice are the reasons why such a large portion of mankind, after nature has long dispensed them from the external direction, remain under the tutelage of the whole life, and why it is so easy For others to position themselves as their guardians."
40-"If I have a book that understands me, a pastor who is aware of me, a doctor who decides my diet, and so forth, I do not need to worry. I do not need to think, if I can only pay, others will easily take care of the annoying work for me."
41-"Becoming competent is considered very dangerous by the largest portion of mankind."
42-"Creating an unsuccessful period of time in the progress of humanity is absolutely forbidden."
43-"For himself (and only for a short time) a man can postpone enlightenment in what he should know, but to renounce it for posterity is to hurt and trample upon the rights of mankind."
44-"Have patience for a while, slanders live little. The truth is the daughter of time, it will soon appear to claim you."
45-"The new prejudices will serve as the old ones to capture the great non-thinking masses."
46-"For this enlightenment, nothing is required except liberty, and indeed the most harmless to which this term may refer... But I hear everywhere: Do not argue!, the officer says Do not argue, but exercise! Tax collector: Do not argue, but pay!, the clergyman Do not argue, but believe! Only a prince in the world says: Discuss what you want, what you want but obey! Everywhere there is a restriction on freedom."
47-"A generation can not bind itself and order to put the next one in such condition that it can not extend (at most very occasionally) its knowledge, purify itself of errors and progress in general enlightenment."
48."The touchstone of all that can be concluded as law for a person lies in the question of whether the person would have imposed such law upon himself."
49-"How, then, do you seek perfection? Where is our hope? In education and nothing else."
50-"Dare to know!"
51-"There is something splendid in innocence, but what is bad about it, on the other hand, is that it can not be protected very well and is easily seduced."
52-"In all trials where we describe something as beautiful, we do not allow anyone else to have another opinion."
53-"As nature has discovered from beneath her hard shell the seed of that which she most tenderly wants, the propensity and vocation to free thought, this gradually returns upon the character of the people, who gradually become able to handle freedom ; Finally, affects the principles of government, which finds it beneficial to treat men, who are now more than machines, according to their dignity.
54-"The light dove, in free fall cutting through the air the resistance it feels, can understand the idea that it could do even better in the airless space. In the same way, Plato left the world of the senses because he had many obstacles to understanding, and dared to go beyond the wings of ideas, into the empty space of pure understanding."
55-"Man must be disciplined, for he is by nature raw and wild."
56-"Law and freedom without violence (anarchy), law and violence without freedom (despotism), violence without freedom or law (barbarism), violence with law and freedom (republic)"
57-"An action, to have moral value, must have been done from duty."
58-"Nothing is divine but what pleases reason."
59-"Marriage is the union of two persons of different sex with a view of mutual possession of each other's sexual attributes for the duration of their lives."
60-"Skepticism is a place of rest for human reason, where it can reflect its dogmatic adventures and inspect the region in which it finds itself, so that in the future it will be able to choose its path with greater certainty. But this is not a place for permanent settlement, it can only be obtained by the perfect certainty of our knowledge, both of the objects themselves and of the boundaries in which all our knowledge of objects is enclosed.
61-"Without man and his potential for moral progress, all reality would be a mere desert, a thing in vain, without final purpose."
62-"Reading all good books is like a conversation with the best minds of past centuries."
63-"The rules for happiness: something to do, something to love, something to look forward to."
"The schematism by which our understanding deals with the phenomenal world is a skill so deeply hidden in the human soul that we will hardly guess the secret that nature employs here."
65-"In the realm of ends everything has a price or a dignity. What has a price can be replaced by something more that is equivalent; Which on the other hand, is raised above all price and does not admit equivalents, is dignity."
"Armies constantly threaten other nations with war, giving the appearance that they are prepared for it, with nations addicted to compete with another in the number of men in their arms, and this practice knows no bounds. And since the costs related to maintaining peace in this way will eventually outweigh those of a short war, armies are the cause of aggressive wars that attempt to end heavy expenditures. Moreover, paying men to kill or die seems to use them as mere machines and tools in the hands of another (the nation), which is inconsistent with the rights of mankind."
67-"Beauty represents an indeterminate concept of understanding, the sublime and indeterminate concept of reason."
"Mathematics, the natural sciences, the laws, the arts, even morality do not completely fill the soul; There is always a spare space reserved for pure and speculative reason, the empty one that leads us to look for caprices, buffoons and mysticism for what seems to be employment and entertainment but really is a mere pastime taken to cushion the problematic voice of reason, which , According to its nature, requires something that can satisfy us and does not merely serve other purposes or interests of our inclinations."
69-"It is the land of truth (enchanted name), surrounded by a wide and stormy ocean, the true home of illusion, where many banks of mist and ice melt fast, tempting us to believe in new lands, constantly deceiving The adventurous sailor with vain hopes, and engaging him in adventures that he can never leave or finish."