Man is not born to solve the problem of the universe, but to find out what he has to do; and to restrain himself within the limits of his comprehension.

Every individual who is not creative has a negative, narrow, exclusive taste and succeeds in depriving creative being of its energy and life.

There is no patriotic art and no patriotic science.

The greatest joy of a thinking man is to have searched the explored and to quietly revere the unexplored.

Let us live, while we are alive!

The ideal of beauty is simplicity and tranquility.

No matter what one says, you can recognize only those matters that are equal to you. Only rulers who possess extraordinary abilities will recognize and esteem properly extraordinary abilities in their subjects and servants.