"With patience a ruler may be persuaded, and a soft tongue can break bones." what does this proverb mean?

Well rulers don't like to be proven wrong therefore you have to be patient in convincing a ruler that your idea is best. It's pretty much like what inception is in the movie.

A soft tongue is using calm words which in my opinion means you have the utmost confidence in what you're saying. I dont think it literally means bones will break but the person listening will feel as though they are completely wrong if a calm cool person is proving them wrong.

See answer below

Step-by-step explanation:

Well rulers don't like to be proven wrong therefore you have to be patient in convincing a ruler that your idea is best.

A soft tongue is using calm words which means you have the utmost confidence when speaking. The phrase "break bones" means that a person listening will feel as though they are completely wrong if a calm cool person is proving them wrong.