"The world stands upon three things: upon the Law, upon worship, and upon showing kindness."
Mishnah, Abot 1.2
"Rabbi Yohanan ben Zakkai said, Go forth and see which is the good way to which a man should cleave. Rabbi Eliezar said, A good eye; Rabbi Joshua said, A good friend; Rabbi Jose said, A good neighbor; Rabbi Simeon said, One who foresees the fruit of an action; Rabbi Elazar said, A good heart. Thereupon he said to them, I approve the words of Elazar ben Arach, rather than your words, for in his words yours are included."
Mishnah, Abot 2.13
"Aid an enemy before you aid a friend, to subdue hatred."