Paul addresses the way in which the church should deal with the differences in Romans 14:1 – 15:13. He writes about accepting one another in Romans 14:1–12. In Romans 14:13–23 he underlines not to cause your brother or sister to stumble. And in Romans 15:1–7 he explains that unity is necessary to glorify God together.
1 As for the one who is weak in faith, welcome him, but not to quarrel over opinions.