Let everyone sweep in front of his own door, and the whole world will...

Error is acceptable as long as we are young but one must not drag it along into old age.

Age merely shows what children we remain.

The credit of advancing science has always been due to individuals and never to the age.

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.