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

Act only according to that maxim whereby you can at the same time will that it should become a universal law.

Have patience awhile; slanders are not long-lived. Truth is the child of time; erelong she shall appear to vindicate thee.

All human knowledge begins with intuitions, proceeds from thence to concepts, and ends with ideas.

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

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

Maximum individuality within maximum community