Rom.14.1  As for the man who is weak in faith, welcome him, but not for disputes over opinions.
1Cor.7.25  Now concerning the unmarried, I have no command of the Lord, but I give my opinion as one who by the Lord's mercy is trustworthy.

Hyper-concordance v1.1, by Sean Boisen. Scripture verses taken from the Revised Standard Version, copyright 1952, 1971.