אבות ב, ט - דרך ישרה, דרך עקומה

(9) He [Rabban Yohanan] said unto them: go forth and observe which is the right way to which a man should cleave? Rabbi Eliezer said, a good eye; Rabbi Joshua said, a good companion; Rabbi Yose said, a good neighbor; Rabbi Shimon said, foresight. Rabbi Elazar said, a good heart. He [Rabban Yohanan] said to them: I prefer the words of Elazar ben Arach, for in his words your words are included. He [Rabban Yohanan] said unto them: go forth and observe which is the evil way which a man should shun? Rabbi Eliezer said, an evil eye; Rabbi Joshua said, an evil companion; Rabbi Yose said, an evil neighbor; Rabbi Shimon said, one who borrows and does not repay for he that borrows from man is as one who borrows from God, blessed be He, as it is said, “the wicked borrow and do not repay, but the righteous deal graciously and give” (Psalms 37:21). Rabbi Elazar said, an evil heart. He [Rabban Yohanan] said to them: I prefer the words of Elazar ben Arach, for in his words your words are included.

(1) "A good eye": One who suffices with what he has and does not seek extraneous things - and is not envious when he sees that his fellow has more than him.

(2) "A good friend": who rebukes him when he sees him doing something that is improper.

(3) "A good neighbor": who is found near him, whether by day or by night; whereas a good friend is not found near him all the time.

(4) "Seeing the consequences of one's actions": One who looks out and sees what will be in the future. And through this, he calculates the loss [engendered by doing] a commandment versus its reward and the reward [engendered by doing] a sin versus its loss.

(5) "A good heart": Since the heart is the generator of all the other forces and it is the source from which emanate all of the actions. And even though there are specific limbs for [different] actions, nonetheless, the place of the force that animates all of the actions is in the heart. Therefore, Rabbi Elazar ben Arakh said, "A good heart." And for this reason, Rabbi Yochanan ben Zakkai said, "I see the words of Rabbi Elazar ben Arakh [as better than] all of yours."

(6) "what is an evil path that a person should distance himself from": He needed to ask them this, as he did not understand from their first words that the evil path is the opposite of the good path [that they each suggested], since not with all that is good is its opposite evil. As [for example] piety - and that is going beyond the letter of the law - is good, but one who is not pious and holds his actions according to the law of the Torah is not evil. And it may have been possible to say, if sufficing - and that is a good eye - is the good path, the seeking of extraneous things is not the evil path, as he does not hurt any person with this. And so [too] with the other traits. Therefore, he had to ask them, "what is the evil path that a person should distance himself from."

(7) "One who borrows but does not repay": And this is the opposite of "seeing the consequences of one's actions;" as if he does not repay, who will [now] lend to him and he will be stuck in [his] famine. And he did not say just, "not seeing the consequences of one's actions," as it is possible for a person who does not see the consequences of his actions not to come to a mishap, as he will be able to rescue himself when that consequence comes to him.

(8) "'but the righteous one gives graciously'": [It is] speaking about the Holy One, blessed be He, who is the righteous One of the world, Who gives graciously to the lender what this one borrowed from him and did not repay him. It comes out that the borrower is in debt to the Omnipresent.

what is a straight path that a person should cling to: From all of the good and straight paths that a person should cling to. He means to say to cling to one trait, to be complete with it. As it is better for a person to grab one trait in full - that it become easy for him to reach all of the important traits via it - than his being someone with [attempted mastery of] many traits and he is not complete in any one of them.