Do Not Despair

An intense debate erupted in the Beis Medrash. According to the Gemara, the debate spanned at least three decades (Bava Kama 67b). The debate was so long that there were three different Roshei Yeshiva during this time.
In fact, four of the sages involved in the discussion were all destined to become the Rosh HaYeshiva. One wonders if any of them could have envisioned at the time that they would all succeed one another as the Rosh HaYeshiva. The four future Roshei Yeshiva were: Rabba, Rav Yosef, Abaya, and Rava.
The discussion centered around a seemingly simple question: when a thief steals an item, he has an obligation as part of his teshuva process to return the stolen item. If the thief no longer has the item, he must provide monetary restitution. If he has the original item, he must return it and cannot give money in its place. The question arose regarding a situation where the victim despaired of ever receiving his stolen item back. This is referred to as a state of yiush. May the penitent thief keep the item he stole and offer money instead? The Gemara refers to this as yiush kedi kani. Perhaps, he must still return the original item – yiush kedi lo kani.