"Who visits a sick friend lessens his pain a little." ~~ Talmud, Nedarim
"Your own life must be considered before your friend’s." ~~ Talmud, Bava Metzia
"Who looks for a faultless friend will have none." ~~ Judah Leib Lazerov
"When a friend changes, regard him as an enemy." ~~ Joseph Caspi
"To pull a friend out of the mire, don’t hesitate to get dirty." ~~ Baal Shem Tov
"Who is the laziest man on earth? The man too lazy to make friends; but even lazier [is] the man who made friends and lost them." ~~ Mivchar Hapeninim
"I have lost a dear friend. Did he die? No, he became rich." ~~ Franz Rosenzweig
"When fortune favors you, you will find every man your faithful friend." ~~ Mishle Israel
"Two dogs were bad friends. One day the wolf attacked one of them. Quoth the other: “If I do not help him today, the wolf will destroy him and tomorrow attack me.” So they joined forces and killed the wolf." ~~ Talmud, Sanhedrin
"Friends are of three kinds: one like food which one cannot do without; one like medicine which you may need now and then; and one like pestilence which no one needs at all." ~~ Mivchar Hapeninim
"Beware of friends, not enemies." ~~ Judah Leib Lazerov
"The best minister is the human heart; the best teacher is time; the best book is the world; the best friend is God." ~~ Yiddish Proverb