What does no moral suffering means

What is implied in this sentence from mark twain's "the £1,000,000 bank-note"? i was puzzled, and wanted to discuss the matter a little further, but they didn't; so i took my leave, feeling hurt and insulted to be made the butt of what was apparently some kind of a practical joke, and yet obliged to put up with it, not being in circumstances to resent affronts from rich and strong folk.

In describing jimmy wells as the truest, most loyal fellow, what tone is conveyed

According to the study what did john steinbeck do to prepare for his book the grapes of wrath