In chapter 2 of Pirkei Avos (Ethics of Our Fathers) it says that:
"Rabban Yochanan the son of Zakkai had five disciples"
It goes on to list their names and qualities, and then it says that R' Yochanan said:
"Go and see which is the best trait for a person to acquire".
-Said Rabbi Eliezer: A good eye.
-Said Rabbi Joshua: A good friend.
-Said Rabbi Yossei: A good neighbor.
-Said Rabbi Shimon: To see what is born [out of ones actions].
-Said Rabbi Elazar: A good heart.
Then R' Yochanan asks the opposite question:
"Go and see which is the worst trait, the one that a person should most distance himself from."
- Said Rabbi Eliezer: An evil eye.
- Said Rabbi Joshua: An evil friend.
- Said Rabbi Yossei: An evil neighbor.
- Said Rabbi Shimon: To borrow and not to repay; for one who borrows from man is as one who borrows from the Almighty, as is stated, ``The wicked man borrows and does not repay; but the righteous one is benevolent and gives'' (Psalms 37:21).
- Said Rabbi Elazar: An evil heart.
One of these things is not like the others. Each of the Rabbis gave exactly the opposite answer the second time, while Rabbi Shimon gave a totally different one! Granted, you may say that borrowing without repaying is not thinking about the consequences of ones actions, but it is certainly a very narrow case, compared to his first answer.
What gives? (Especially looking for sources, rather than logic-based answers, although those are welcome too.)