Maimonides

Rabbi Moshe ben Maimon (Hebrew: ??? ??? ?? ??????; Arabic: Mussa bin Maimun ibn Abdallah al-Kurtubi al-Israili; March 30, 1135—December 13, 1204), commonly known by his Greek name (Moses) Maimonides, was a Jewish rabbi, physician, and philosopher. Many Jewish works refer to him by the acronym of his title and name, RaMBaM (????"? in Hebrew). As such, he is frequently referred to as "the Rambam". His Greek appellation means "Son of Maimon," and is a literal rendition of "ben Maimon."

Quotes from Maimonides

• Teach your tongue to say "I do not know" and you will progress.
• The risk of a wrong decision is preferable to the terror of indecision.
• You must accept the truth from whatever source it comes.
• Anticipate charity by preventing poverty; assist the reduced fellow man, either by a considerable gift or a sum of money or by teaching him a trade or by putting him in the way of business so that he may earn an honest livelihood and not be forced to the dreadful alternative of holding out his hand for charity. This is the highest step and summit of charity's golden ladder. (See Rambam's Ladder in Tzedakah.)
• We are obligated to be more scrupulous in fulfilling the commandment of charity than any other positive commandment because charity is the sign of a righteous man.
• No disease that can be treated by diet should be treated with any other means.
• One should see the world, and see himself as a scale with an equal balance of good and evil. When he does one good deed the scale is tipped to the good - he and the world is saved. When he does one evil deed the scale is tipped to the bad - he and the world is destroyed.