James uses this question to teach his audience about proper behavior. The words "wise" and "understanding" mean basically the same thing. AT: "The person who thinks he is wise should" (See: [[rc://en/ta/man/translate/figs-rquestion]] and [[rc://en/ta/man/translate/figs-doublet]])
## by his works in the humility that comes from wisdom ##
"with his good deeds and humility that comes from having true wisdom"
## have bitter jealousy and selfish ambition in your heart ##
"heart" refers to emotions or thoughts. Alternative translation: "will not share with others and you always put yourself first." (See: [[rc://en/ta/man/translate/figs-metonymy]])