This is part of a series of questions on the Gemara in Bechoros 8b-9a. Below is a summary of the relevant parts of the Gemara. After being challenged by Caesar, R' Yehoshua went to Athens to defeat the Athenian Elders in a battle of wits.
In the process of their debate, the Elders asked the following question: "If a man had a hard time recovering money from one of his borrowers, should he lend money again?"
R' Yehoshua responded with what seems to be a mashal. "If a man chopped wood and can't lift what he chopped, should he not cut more? Eventually someone will come along and help him carry."
How is this a response to the Elders' question? In their question, the Elders are assuming that most borrowers wouldn't be able to pay back. R' Yehoshua doesn't seem to debate this point; all he says is that someone will be able to help him if he gets into trouble again.