The title promises proverbs, but these three lines don't behave like the ones we know. A real proverb sounds like settled wisdom. Here, each line starts to make a point and then swerves somewhere odd.
The first calls chance a rogue, then gives a tiny, almost comic example: the speaker's clothes tore. A grand idea collapses into a small embarrassment. The second line is stranger still. The speaker "saw no peace," yet the wife is impatient to buy "it," and we never learn what "it" is. Peace seems to be something you could shop for, which is both funny and a little sad. The last line hands the idea off to rumor ("it is said") and imagines an impossible match between a rabbit and a lobster.
The mood is playful and puzzling, with a dry, deadpan humor. The speaker seems less sure of the world's wisdom than the form suggests. The poem seems to suggest that sayings can sound meaningful while the sense slips away, leaving the reader to supply it.