The word "fruit" here is a metonym for the tree that produces the fruit, and the tree is a metaphor for a person who does what is right. Alternate translation: "Those who do right will bring life to themselves and others" (See: [[rc://en/ta/man/jit/figs-metonymy]] and [[rc://en/ta/man/jit/figs-metaphor]])
"but the one who kills people is violent." Some modern translations read, "and the one who wins souls is wise," that is, a wise person will convince other people to do what is right.