Science is nothing but perception.

Those who are too smart to engage in politics are punished by being governed by those who are dumber.

Both oligarch and tyrant mistrust the people, and therefore deprive them of their arms.

The greatest and most important problems of life are all fundamentally insoluble. They can never be solved but only outgrown.

Great talents are the most lovely and often the most dangerous fruits on the tree of humanity. They hang upon the most slender twigs that are easily snapped off.

Nobody, as long as he moves about among the chaotic currents of life, is without trouble.

Knowledge rests not upon truth alone, but upon error also.

The word "happiness" would lose its meaning if it were not balanced by sadness.

Every form of addiction is bad, no matter whether the narcotic be alcohol or morphine or idealism.

He who would travel happily must travel light.