Is there an obligation to be effective or maximise goodness?

Rabbi Eliezer ben Ya’akov says: A person should not donate a peruta to the charity purse unless a great and trusted individual like Rabbi Ḥananya ben Teradyon is appointed as supervisor over it. This seems to indicate that putting money into the charity box is not always preferred. The Gemara answers: When we say that putting money into the charity box is the preferred way to give charity, this is referring to when a man like Rabbi Ḥananya ben Teradyon is appointed as supervisor over it.

(16) He [Rabbi Tarfon] used to say: It is not your duty to finish the work, but neither are you at liberty to neglect it; If you have studied much Torah, you shall be given much reward. Faithful is your employer to pay you the reward of your labor; And know that the grant of reward unto the righteous is in the age to come.

(11) “What need have I of all your sacrifices?” Says the LORD. “I am sated with burnt offerings of rams, And suet of fatlings, And blood of bulls; And I have no delight In lambs and he-goats. (12) That you come to appear before Me— Who asked that of you? Trample My courts (13) no more; Bringing oblations is futile, Incense is offensive to Me. New moon and sabbath, Proclaiming of solemnities, Assemblies with iniquity, I cannot abide. (14) Your new moons and fixed seasons Fill Me with loathing; They are become a burden to Me, I cannot endure them. (15) And when you lift up your hands, I will turn My eyes away from you; Though you pray at length, I will not listen. Your hands are stained with crime— (16) Wash yourselves clean; Put your evil doings Away from My sight. Cease to do evil; (17) Learn to do good. Devote yourselves to justice; Aid the wronged. Uphold the rights of the orphan; Defend the cause of the widow.

(4) Because you fast in strife and contention, And you strike with a wicked fist! Your fasting today is not such As to make your voice heard on high. (5) Is such the fast I desire, A day for men to starve their bodies? Is it bowing the head like a bulrush And lying in sackcloth and ashes? Do you call that a fast, A day when the LORD is favorable? (6) No, this is the fast I desire: To unlock fetters of wickedness, And untie the cords of the yoke To let the oppressed go free; To break off every yoke. (7) It is to share your bread with the hungry, And to take the wretched poor into your home; When you see the naked, to clothe him, And not to ignore your own kin. (8) Then shall your light burst through like the dawn And your healing spring up quickly; Your Vindicator shall march before you, The Presence of the LORD shall be your rear guard.

(1) Then He called loudly in my hearing, saying, “Approach, you men in charge of the city, each bearing his weapons of destruction!” (2) And six men entered by way of the upper gate that faces north, each with his club in his hand; and among them was another, clothed in linen, with a writing case at his waist. They came forward and stopped at the bronze altar. (3) Now the Presence of the God of Israel had moved from the cherub on which it had rested to the platform of the House. He called to the man clothed in linen with the writing case at his waist; (4) and the LORD said to him, “Pass through the city, through Jerusalem, and put a mark on the foreheads of the men who moan and groan because of all the abominations that are committed in it.” (5) To the others He said in my hearing, “Follow him through the city and strike; show no pity or compassion. (6) Kill off graybeard, youth and maiden, women and children; but do not touch any person who bears the mark. Begin here at My Sanctuary.” So they began with the elders who were in front of the House. (7) And He said to them, “Defile the House and fill the courts with the slain. Then go forth.” So they went forth and began to kill in the city. (8) When they were out killing, and I remained alone, I flung myself on my face and cried out, “Ah, Lord GOD! Are you going to annihilate all that is left of Israel, pouring out Your fury upon Jerusalem?” (9) He answered me, “The iniquity of the Houses of Judah and Israel is very very great, the land is full of crime and the city is full of corruption. For they say, ‘The LORD has forsaken the land, and the LORD does not see.’ (10) I, in turn, will show no pity or compassion; I will give them their deserts.” (11) And then the man clothed in linen with the writing case at his waist brought back word, saying, “I have done as You commanded me.”

As Rabbi Aḥa, son of Rabbi Ḥanina, said: Never did a promise manifesting a good attribute emerge from the mouth of the Holy One, Blessed be He, and He later retracted it and rendered it evil, except with regard to this matter, as it is written: “And the Lord said to him: Go through the midst of the city, through the midst of Jerusalem, and set a mark [tav] upon the foreheads of the men that sigh and that cry on account of all the abominations that are done in her midst” (Ezekiel 9:4). The Holy One, Blessed be He, said to the angel Gabriel: Go and inscribe a tav of ink on the foreheads of the righteous as a sign so that the angels of destruction will not have dominion over them. And inscribe a tav of blood on the foreheads of the wicked as a sign so that the angels of destruction will have dominion over them. The attribute of justice said before the Holy One, Blessed be He: Master of the Universe, how are these different from those? He said to that attribute: These are full-fledged righteous people and those are full-fledged wicked people. The attribute of justice said to Him: Master of the Universe, it was in the hands of the righteous to protest the conduct of the wicked, and they did not protest. He said to that attribute: It is revealed and known before Me that even had they protested the conduct of the wicked, they would not have accepted the reprimand from them. They would have continued in their wicked ways. The attribute of justice said before Him: Master of the Universe, if it is revealed before You that their reprimand would have been ineffective, is it revealed to them? The Holy One, Blessed be He, retracted His promise to protect the righteous and decided that those who failed to protest would also be punished. And that is the meaning of that which is written: “Slay utterly old and young, both maid, and little children, and women; but come not near any man upon whom is the mark; and begin at My Sanctuary” (Ezekiel 9:6).

(14) "God will deal kindly with you (Ruth 1:8)" . Rabbi Chanina son of Ada says, "He will deal (ya'aseh)" is what is written (k'tiv), "as you dealt with the dead" when you were occupied with their shrouds, "and with me" when they renounced their ketubot. Rabbi Zeira says: "This book [of Ruth] does not have anything in it concerned with impurity or purity nor what is forbidden and what is permitted. So why is it written? To teach us the greatness of the reward for acts of lovingkindness."

(12) Come, my sons, listen to me; I will teach you what it is to fear the LORD. (13) Who is the man who is eager for life, who desires years of good fortune? (14) Guard your tongue from evil, your lips from deceitful speech. (15) Shun evil and do good, seek amity and pursue it.