Here I shall add that the concept of change, and with it the concept of motion, as change of place, is possible only through and in the representation of time. & Motion, for example, presupposes the perception of something movable. But space considered in itself contains nothing movable; consequently motion must be something which is found in space only through experience -in other words, is an empirical datum.

Procrastination is hardly more evil than grasping impatience.

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

But a lie is a lie, and in itself intrinsically evil, whether it be told with good or bad intents.

Two things fill the mind with ever-increasing wonder and awe, the more often and the more intensely the mind of thought is drawn to them: the starry heavens above me and the moral law within me... Morality is not properly the doctrine of how we may make ourselves happy, but how we may make ourselves worthy of happiness.

God, freedom, and immortality are untenable in the light of pure reason.

Act in such a way that you will be worthy of being happy.