The man who has no inner-life is a slave to his su...

I'm not interested in age. People who tell me their age are silly. You're as old as you feel.

Let us be true: this is the highest maxim of art and of life, the secret of eloquence and of virtue, and of all moral authority.

To know how to suggest is the great art of teaching. To attain it we must be able to guess what will interest we must learn to read the childish soul as we might a piece of music. Then, by simply changing the key, we keep up the attraction and vary the song.

Anyone who stops learning is old, whether at twenty or eighty. Anyone who keeps learning stays young. The greatest thing in life is to keep your mind young.

There is a fountain of youth: it is your mind, your talents, the creativity you bring to your life and the lives of people you love. When you learn to tap this source, you will truly have defeated age.

Life would be infinitely happier if we could only be born at the age of eighty and gradually approach eighteen.

Probably the happiest period in life most frequently is in middle age, when the eager passions of youth are cooled, and the infirmities of age not yet begun as we see that the shadows, which are at morning and evening so large, almost entirely disappear at midday.