A truth does not become greater by repetition.

Every man should view himself as equally balanced: half good and half evil. Likewise, he should see the entire world as half good and half evil.... With a single good deed he will tip the scales for himself, and for the entire world, to the side of good.

Truth does not become more true by virtue of the fact that the entire world agrees with it, nor less so even if the whole world disagrees with it.

The more necessary a thing is for living beings, the more easily it is found and the cheaper it is; the less necessary it is, the rarer and dearer it is.

It is possible that the meaning of wisdom in Hebrew indicates aptitude for stratagems and the application of thought in such a way that the stratagems and ruses may be used in achieving either rational or moral virtues, or in achieving skill in a practical art, or in working evil and wickedness.

Medical practice is not knitting and weaving and the labor of the hands, but it must be inspired with soul and be filled with understanding and equipped with the gift of keen observation . . .

No disease that can be treated by diet should be treated with any other means.