There is one Body and one Spirit … there is one Lord, one faith, one baptism, and one God and Father of us all…
Ephesians 4:4-6

Accept him whose faith is weak, without passing judgment on disputable matters … Who are you to judge someone else’s servant? To his own master he stands or falls … So then each of us will give an account of himself to God… So whatever you believe about these things keep between yourself and God.
Romans 14:1, 4, 12, 22

And if I have prophetic powers, and understand all mysteries and all knowledge, and if I have all faith, so as to remove mountains, but have not love, I am nothing.
1 Corinthians 13:2