Be kindly affectioned one to another with brotherly love; in honour preferring one another;
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Romans 12:8-12
Tyndale Open Study Notes (CC BY-SA 4.0).
12:10 genuine affection: Literally brotherly love. Christians are to love each other with the mutual love and commitment that are found within a healthy family.
Other Bible passages linked to this one, most cited first.
Let nothing be done through strife or vainglory; but in lowliness of mind let each esteem other better than themselves.
A new commandment I give unto you, That ye love one another; as I have loved you, that ye also love one another. By this shall all men know that ye are my disciples, if ye have love one to another.
Let brotherly love continue.
Beloved, if God so loved us, we ought also to love one another.
Finally, be ye all of one mind, having compassion one of another, love as brethren, be pitiful, be courteous: Not rendering evil for evil, or railing for railing: but contrariwise blessing; knowing that ye are thereunto called, that ye should inherit a blessing.
Seeing ye have purified your souls in obeying the truth through the Spirit unto unfeigned love of the brethren, see that ye love one another with a pure heart fervently:
Authorship: the book itself or Christian tradition. Approximate dates, as in Carson and Moo, An Introduction to the New Testament, and Longman and Dillard, An Introduction to the Old Testament.