"Foolish and frivolous things are easy to learn and hard to forget." ~~ Avot Derabbi Nathan
"Every controversy that is for God’s sake will be of lasting worth in the end." ~~ Avot 5:17
"Know whence you came and whither you go!" ~~ Avot 3:1
"If your friend did you a little good, let it be large in your sight! If he did you much harm, think it a trifle!" ~~ Avot Derabbi Nathan
"Shun a bad neighbor!" ~~ Avot 1:7
"Turn the Torah and turn it again, for all things are in it!" ~~ Avot 5:22
"Who is rich? He that rejoices in his portion." ~~ Avot 4:1
"Better an hour of repentance and good deeds in this world than a lifetime in the world to come." ~~ Avot 4:17
"Repent the day before you die [which means every day, for who knows the day of his death]. " ~~ Rabbi Eliezer, Avot 2:10
"A tree whose branches are abundant but whose roots are few, the wind comes and uproots and overturns it." ~~ Avot 3:17
"Look not on the jar but on its contents!" ~~ Avot 4:20
"Who is honored? He that honors mankind." ~~ Avot 4:1