If war is ever lawful, then peace is sometimes sin...

How incessant and great are the ills with which a prolonged old age is replete.

Friendship is unnecessary, like philosophy, like art... It has no survival value rather it is one of those things that give value to survival.

Even in literature and art, no man who bothers about originality will ever be original: whereas if you simply try to tell the truth (without caring twopence how often it has been told before) you will, nine times out of ten, become original without ever having noticed it.

Why should society feel responsible only for the education of children, and not for the education of all adults of every age?

The enemy of society is middle class and the enemy of life is middle age.

We have entered an age in which education is not just a luxury permitting some men an advantage over others. It has become a necessity without which a person is defenseless in this complex, industrialized society. We have truly entered the century of the educated man.

The class distinctions proper to a democratic society are not those of rank or money, still less, as is apt to happen when these are abandoned, of race, but of age.

Age is an issue of mind over matter. If you don't mind, it doesn't matter.

Common sense is the collection of prejudices acquired by age eighteen.

The older I grow the more I distrust the familiar doctrine that age brings wisdom.

Wisdom doesn't necessarily come with age. Sometimes age just shows up all by itself.

The best way to find yourself is to lose yourself in the service of others.

You must take personal responsibility. You cannot change the circumstances, the seasons, or the wind, but you can change yourself. That is something you have charge of.

The past cannot be changed. The future is yet in your power.