en_tn/pro/20/05.md

The purposes in a human heart are like deep water

How difficult it is to guess the reasons for someone's actions is compared to how hard it is to see the bottem of a deep lake or river. (See: rc://en/ta/man/translate/figs-simile)

will draw them out

AT: "will cause the purposes to be known" or "will figure it out"

loyal

"faithful" or "trustworthy"

but who can find one who is faithful?

The implicit answer is "few can find someone like that" AT: "but few men can find a person who is faithful" or "but it is hard to find a person who really is faithful" (See: rc://en/ta/man/translate/figs-rquestion)