He that hath shipped the devil must make the best of him.

A person who willingly brings trouble into their affairs cannot expect it to become pleasant or easy. They must work with the situation they have created.

The proverb emphasizes practical acceptance rather than approval: after a choice has been made, the immediate task is to handle its difficulties as well as possible.

Use it when someone has chosen a troublesome partner, ally, or arrangement and must now make the best of it. It can convey wry advice or criticism, especially if the difficulty was foreseeable.