May we present Immanual Kant:
Act that your principle of action might safely be made a law for the whole world.
All our knowledge begins with the senses, proceeds then to the understanding, and ends with reason. There is nothing higher than reason.
All thought must, directly or indirectly, by way of certain characters, relate ultimately to intuitions, and therefore, with us, to sensibility, because in no other way can an object be given to us.
By a lie, a man… annihilates his dignity as a man.
Happiness is not an ideal of reason, but of imagination.
In law a man is guilty when he violates the rights of others. In ethics he is guilty if he only thinks of doing so.
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.
If man makes himself a worm he must not complain when he is trodden on.
Science is organized knowledge. Wisdom is organized life.
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.