He who learns but does not think, is lost. He who thinks but does not learn is in great danger.

He with whom neither slander that gradually soaks into the mind, nor statements that startle like a wound in the flesh, are successful may be called intelligent indeed.

To know that one knows what one knows, and to know that one doesn't know what one doesn't know, there lies true wisdom.

The chase of gain is rich in hate

Balance is the perfect state of still water. Let that be our model. It remains quiet within and is not disturbed on the surface.

Do not use a cannon to kill a mosquito.

Success depends upon previous preparation, and without such preparation there is sure to be failure.