What are the aims which are at the same time duties? They are perfecting of ourselves, the happiness of others.

Act so that the maxim of your act could be made the principle of a universal law.

Art is purposiveness without purpose.

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.

One is not rich by what one owns, but more by what one is able to do without with dignity.

We are not rich by what we possess but by what we can do without.

If it were possible for us to have so deep an insight into a man's character as shown both in inner and in outer actions, that every, even the least, incentive to these actions and all external occasions which affect them were so known to us that his future conduct could be predicted with as great a certainty as the occurrence of a solar or lunar eclipse, we could nevertheless still assert that the man is free.