I think, therefore I am.

A man may imagine things that are false, but he can only understand things that are true.

An intelligent hell would be better than a stupid paradise.

I've learned that people will forget what you said, people will forget what you did, but people will never forget how you made them feel.

Early to bed and early to rise, Makes a man healthy, wealthy, and wise.

Nobody made a greater mistake than he who did nothing because he could do only a little.

To kill an error is as good a service as, and sometimes even better than, the establishing of a new truth or fact

True knowledge lies in knowing how to live.

Whatever the mind of man creates, should be controlled by man's character

It has seemed to be more necessary to have regard to the weight of words rather than to their number.

There are no limitations to the mind except those we acknowledge.

Everybody is ignorant, only on different subjects.

In order to change the world, you have to get your head together first

To avoid criticism say nothing, do nothing, be nothing.

What can't be cured must be endured.

A perfection of means, and confusion of aims, seems to be our main problem.

Moderation in temper is always a virtue; but moderation in principle is always a vice.

All great achievements require time.

When you learn, teach, when you get, give.

Never ruin an apology with an excuse.

The ethos of redemption is realized in self-mastery, by means of temperance, that is, continence of desires.