Judge not thy friend until thou standest in his place.
He who refuses to learn deserves extinction.
If not you, who? If not now, when?
If I am not for myself, then who will be for me? But when I am for myself, then what am "I"? And if not now, when?
Who does not grow, declines.
Golden Rule”: “That which is hateful to you, do not do to your fellow. That is the whole Torah; the rest is the explanation; go and learn.