Not the ignorant,he will learn and come out of his ignorance over time…

Not the wise,he is not wise for nothing,true wisdom opens him up to learn more from you…

The most difficult person you can ever meet is someone who knows the truth,who also knows you are saying the truth but deliberately rejects or suppresses the truth…

You can’t help him!

Even God gave such person over:

“The wrath of God is being revealed from heaven against all the godlessness and wickedness of people, who suppress the truth by their wickedness…For although they knew God, they neither glorified him as God nor gave thanks to him, but their thinking became futile and their foolish hearts were darkened…Therefore God gave them over in the sinful desires of their hearts to sexual impurity for the degrading of their bodies with one another…”-Romans 1:18,21,24.