I really think this section of Romans says it all. We don’t need to add to it …just follow it.
Marks of the True Christian
9 Let love be genuine; hate what is evil, hold fast to what is good; 10 love one another with mutual affection; outdo one another in showing honor. 11 Do not lag in zeal, be ardent in spirit, serve the Lord.[e] 12 Rejoice in hope, be patient in suffering, persevere in prayer. 13 Contribute to the needs of the saints; extend hospitality to strangers.
14 Bless those who persecute you; bless and do not curse them. 15 Rejoice with those who rejoice, weep with those who weep. 16 Live in harmony with one another; do not be haughty, but associate with the lowly;[f] do not claim to be wiser than you are. 17 Do not repay anyone evil for evil, but take thought for what is noble in the sight of all. 18 If it is possible, so far as it depends on you, live peaceably with all. 1