It is a cliche that most cliches are true, but then like most cliches, that cliche is untrue.

Real knowledge is to know the extent of one's ignorance.

Colorless green ideas sleep furiously

Men become wise just as they become rich, more by what they save than by what they receive.

Bitterness is like cancer. It eats upon the host. But anger is like fire. It burns it all clean.

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

Act as if the maxim of your action were to become through your will a general natural law

You always admire what you really don't understand.

The use of travelling is to regulate imagination by reality, and instead of thinking how things may be, to see them as they are.

It is better to remain silent and be thought a fool than to open one's mouth and remove all doubt.

The only limit to our realization of tomorrow will be our doubts of today.

If I speak of myself in different ways, that is because I look at myself in different ways.

Mistakes are always forgivable, if one has the courage to admit them.

The greatest minds are capable of the greatest vices as well as of the greatest virtues.

When you dance, your purpose is not to get to a certain place on the floor. It's to enjoy each step along the way.

You can best serve civilization by being against what usually passes for it.

Never do anything when you are in a temper, for you will do everything wrong.

Act enthusiastic and you will be enthusiastic

We may encounter many defeats but we must not be defeated.

I've come to believe that all my past failure and frustration were actually laying the foundation for the understandings that have created the new level of living I now enjoy.

The oldest, shortest words- 'yes' and 'no'- are those which require the most thought.