Avos 1:2 - 1:3

From the remnants: From those remaining, for after they had all died, the tradition remained in his possession. He was High Priest following Ezra.

He would say: Which is to say that he was accustomed to say. And so too every (instance) of "Rabbi x says" (or) "He would say" which is in this tractate; their meaning is "He was accustomed to saying such a thing constantly."

"The world stands": The world was only created for the sake of these three things.

"on the Torah": Had Israel not received Torah, the heavens and the earth would not have been created, as is written (Jeremiah 33:25), "Were it not for my covenant day and night, also the laws of the heavens and the earth I would not have set." (Shabbat 88a)

"on the [Temple] service": The service of the sacrifices. For such have we taught in tractate Taanit, "Were it not for the groupings [involved in the sacrifices] the heavens and the earth would not have endured (Taanit 27b)." And we have found that on account of the sacrifices that Noah brought, the Holy One, blessed be He, swore that He would never bring a flood. So it is that the world stands upon the sacrifices.

"and on acts of lovingkindness": As it is written (Ps. 89:3), “The world is built up by your kindness." And lovingkindness is to regale grooms and to comfort mourners, to visit the sick and inter the dead, and the like.

"Reward (peras)": is a term of valuation. “For your valuation,” we have translated "For his poreis." It is what a person gives to someone who served him, when he is not legally obligated to give him anything, such as what a man would give to his minor son or to his wife or to his servant, because of the satisfaction they have given him. A person should not serve his Creator even for the hope of a reward such as this, but rather out of love alone.

"and may the fear of Heaven be upon you": Even though you serve out of love, also serve out of fear. For the one who serves out of love is quick concerning positive commandment, and the one who serves out of fear is careful concerning negative commandments, resulting in his service being complete. So said our sages, may their memory be blessed, (Jerusalem Talmud Sotah 25a:3), "Serve out of love, serve out of fear: Serve out of love, so if you verge on hating, know that you are a person who loves, for one that loves does not hate. Serve out of fear, for if you verge on rejecting, know that you fearful, for one who is fearful does not reject."