Romans 14:1, 4, 12, 22

Now accept the one who is weak in faith, but not for the purpose of passing judgment on his opinions.

Who are you to judge the servant of another? To his own master he stands or falls; and he will stand, for the Lord is able to make him stand.

So then each one of us will give an account of himself to God.

The faith which you have, have as your own conviction before God. Happy is he who does not condemn himself in what he approves.