Komentaryong Sumisipi para sa Job 41:3

The reason is that every mitzvah is not worthy of reward, as he wrote earlier in the sixth category, because as our sages said on: "Who has given Me anything beforehand, that I should repay him?" (Iyov 41:3) that first G-d bestowed all good to a person and afterwards man performs commandments to make a return. But one who offers his life and soul, and all that is his for G-d, out of love, then all the good of this world is worth nothing to him compared to his love of G-d. If so, how could he not be worthy of the good reward of the righteous and the just? This is clear.

For example, if the lender takes a security pledge on condition that he will lend the borrower 1000 gold coins. Then, if the lender has the 1000 gold coins available, he can take the security pledge. If he does not [have the 1000 gold coins available], then he cannot take it. And a man knows that he does not have the ability to pay G-d in services and righteousness corresponding to all the benefits he gets from G-d. And especially, if he pays back a little bit, it is through G-d's help, as our sages expounded (Midrash Vayikra Rabba 27:2) on the verse: "Who has given Me anything beforehand, that I should repay him?" (Iyov 41:3) - Who put up a mezuzah before I gave him a house? [Who built a Sukkah before I gave him a place upon which to build it? Who performed the mitzvah of tzitzis before I gave him clothing?], likewise, even one's wisdom and praises is from Him, bb'h

From you. 'I request nothing from you but fear and love', for all the commandments are not from you but rather from Him; if He gives you a house, make a mezuzah and a fence [for its flat roof]. Clothing, make fringes. Money, make of it donations. Grain and grape juice and wine, make from them priestly and other tithes. A son, circumcise him. It turns out, performance of the mitzvot is ultimately from God! There is no Arab merchant in the world who, when given 20 dinarim, doesn't give because of this to the One who has commanded regarding it half of the money or a third, and this holds for him goodness. And so too, because of the Holy Blessed One we are able to praise all that You have made and give to him, and not beg at the doors. And this is that he does not ask from us a gift, just fear and love and the intention of the heart, and thus it is written (Job 41:3): "Who has a previous claim on Me, that I should repay him? All that is under the heavens is Mine!" -- I am first to give to them, before they give to Me anything. And so said David, "what is yours has been given to you". And not only do you do a mitzvah, but you even receive benefit! As it is written "to your own good" (Deuteronomy 10:13). And from this verse, our rabbis saw a hint (Menachot 43b) of one hundred daily blessings, as it is written "What [mah/מה] does the Lord your God ask of you?" Do not read "what" [mah/מה], rather one hundred [me'ah/מאה] -- and there are one hundred letters in this verse from "And now", when you read "what" with the additional alef (making it "me'ah"), that in one hundred there are one hundred letters. For within the verse there are 99 letters, and with the alef there are a round 100. And now there are two [hundreds]! -- one that you read, and a further one of the 100 letters.