Ashes fly back into the face of him who throws them.

Necessitynever made a good bargain.

Silenceis foolish if we are wise, but wise if we are foolish.

What wesee depends mainly on what we look for.

Learning without thought is labour lost,thought without learning is perilous.

Ignoring is not the same thing as being tolerant

Nothing astonishes men so much as common sense and plain dealing.

Men are mortal, but ideas are immortal.

Truth is strengthened by observation and delay; falsehood by haste and uncertainity.

Peoplewho are too concerned with how well they are doing will be less successfuland feel less competent than those who focus on the task itself... Somepsychologists call it a conflict between egoorientation,or between extrinsic and intrinsic motivation…

Thereis all the difference in the world between having something to say and havingto say something.

Any general statement is like a cheque drawn on a bank. Its value depends on what is there to meet it.