Immanuel Kant

From such crooked wood as that which man is made of, nothing straight can be fashioned.

But although all our knowledge begins with experience, it does not follow that it arises from experience.

Two things fill me with constantly increasing admiration and awe, the longer and more earnestly I reflect on them the starry heavens without and the moral law within.

What can I know What ought I to do What can I hope

All the interests of my reason, speculative as well as practical, combine in the three following questions 1. What can I know 2. What ought I to do 3. What may I hope

The only objects of practical reason are therefore those of good and evil. For by the former is meant an object necessarily desired according to a principle of reason by the latter one necessarily shunned, also according to a principle of reason.

Religion is the recognition of all our duties as divine commands.

To be is to do.

Nothing is divine but what is agreeable to reason.

Always recognize that human individuals are ends, and do not use them as means to your end.

Two things awe me most, the starry sky above me and the moral law within me.

Immaturity is the incapacity to use one's intelligence without the guidance of another.

Ingratitude is the essence of vileness.

Two things fill the mind with ever new and increasing wonder and awe - the starry heavens above me and the moral law within me.

Do what is right, though the world may perish

Intuition and concepts constitute... the elements of all our knowledge, so that neither concepts without an intuition in some way corresponding to them, nor intuition without concepts, can yield knowledge.

Reason does not work instinctively, but requires trial, practice, and instruction in order to gradually progress from one level of insight to another

Seek not the favor of the multitude it is seldom got by honest and lawful means. But seek the testimony of few and number not voices, but weigh them.

Even philosophers will praise war as ennobling mankind, forgetting the Greek who said 'War is bad in that it begets more evil than it kills.'

It is not God's will merely that we should be happy, but that we should make ourselves happy

May you live your life as if the maxim of your actions were to become universal law.

Perpetual Peace is only found in the graveyard

It is beyond a doubt that all our knowledge that begins with experience.

By a lie, a man... annihilates his dignity as a man.

By a lie a man throws away and, as it were, annihilates his dignity as a man