Both love of mankind, and respect for their rights are duties; the former however is only a conditional, the latter an unconditional, purely imperative duty, which he must be perfectly certain not to have transgressed who would give himself up to the secret emotions arising from benevolence.

Great minds think for themselves.

Three things tell a man: his eyes, his friends and his favorite quotes

The science of mathematics presents the most brilliant example of how pure reason may successfully enlarge its domain without the aid of experience

Human reason is by nature architectonic.

Procrastination is hardly more evil than grasping impatience.

Man's greatest concern is to know how he shall properly fill his place in the universe and correctly understand what he must be in order to be a man.