If not you, who? If not now, when?

Moreover he saw a skull floating on the surface of the water and he said unto it: Because you drowned others they drowned you; and those that drowned you will eventually be drowned.

What you yourself hate, don't do to your neighbor. This is the whole law; the rest is commentary. Go and study.

Be of the disciples of Aaron, loving peace and pursuing peace, loving your fellow creatures and drawing them near to the Law.

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?

Do not unto others that which is hateful unto thee.

Judge not thy friend until thou standest in his place.