Nedarim: (a) Vows; (b) A tractate of the Talmud that discusses the laws of vows.
The liar’s punishment is that even when he speaks the truth, no one believes him
Once a person has sinned and repeated the sin, [he treats it] as if it has become permitted
No two minds are alike, [just as] no two faces are alike
Do not celebrate among the mourners, and do not weep among revelers
There is no community where everyone is rich; neither is there a community where everyone is poor
A person’s true character is ascertained by three parameters: his cup (i.e., his behavior when he drinks), his pocket (i.e., his financial dealings), and his anger
Do not say something that should never be heard, because ultimately it will be heard