'RShimon ben Elazar says: Do not appease your friend at the time of his anger, do not comfort him at the time that his dead lies before him, do not question him at the time of his vow, and do not attempt to see him at the time of his degradation.

Shmuel HaKatan says: “When your foe falls, be not glad, and when he stumbles, let your heart not be joyous, lest Hashem see and it be displeasing in His eyes, and He return His anger from him.”

Elisha ben Avuyah says: One who studies [as] a child, to what is he compared? To ink written on new paper. And one who studies [as] an elder, to what is he compared? To ink written on erased paper.  R' Yose bar Yehudah, leader of Kfar HaBavli, says: One who learns from children, to what is he compared? To one who eats acrid grapes and drinks wine from the press. And one who learns from elders, to what is he compared? To one who eats ripe grapes and drinks aged wine.  Rebbi says: Do not look at the vessel, rather [look] at what it contains, [for] there can be a new [vessel] containing old [wine] and an old [vessel] which lacks even new [wine].