Dare to think! Dare to know! Have the courage to use your own intelligence!

One who makes himself a worm cannot complain afterwards if people step on him.

Rules for happiness: something to do, someone to love, something to hope for.

Genius is the ability to independently arrive at and understand concepts that would normally have to be taught by another person

The busier we are, the more acutely we feel that we live, the more conscious we are of life.

Have patience awhile; slanders are not long-lived. Truth is the child of time; erelong she shall appear to vindicate thee

Man must be disciplined, for he is by nature raw and wild.

Look closely. The beautiful may be small.

Whereas the beautiful is limited, the sublime is limitless, so that the mind in the presence of the sublime, attempting to imagine what it cannot, has pain in the failure but pleasure in contemplating the immensity of the attempt

Thoughts without content are empty, intuitions without concepts are blind.

If the truth shall kill them, let them die.

Enlightenment is man's release from his self-incurred tutelage. Tutelage is man's inability to make use of his understanding without direction from another. Self-incurred is this tutelage when its cause lies not in lack of reason but in lack of resolution and courage to use it without direction from another. Sapere aude! 'Have courage to use your own reason!'- that is the motto of enlightenment.

Two things fill the mind with ever new and increasing admiration and awe, the more often and steadily we reflect upon them: the starry heavens above me and the moral law within me. I do not seek or conjecture either of them as if they were veiled obscurities or extravagances beyond the horizon of my vision; I see them before me and connect them immediately with the consciousness of my existence

Laziness and cowardice are the reasons why so great a portion of mankind, after nature has long since discharged them from external direction (naturaliter maiorennes), nevertheless remains under lifelong tutelage, and why it is so easy for others to set themselves up as their guardians. It is so easy not to be of age. If I have a book which understands for me, a pastor who has a conscience for me, a physician who decides my diet, and so forth, I need not trouble myself. I need not think, if I can only pay - others will easily undertake the irksome work for me.

I had to deny knowledge in order to make room for faith.

But only he who, himself enlightened, is not afraid of shadows

All our knowledge begins with the senses, proceeds then to the understanding, and ends with reason. There is nothing higher than reason.

He who is cruel to animals becomes hard also in his dealings with men. We can judge the heart of a man by his treatment of animals.

Act in such a way that you treat humanity, whether in your own person or in the person of any other, never merely as a means to an end, but always at the same time as an end

IMMANUEL KANT

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