Romans 12:10 (NKJV)
"Be kindly affectionate to one another with brotherly love, in honor giving preference to one another."
Philippians 2:3-5 (NKJV)
"Let nothing be done through selfish ambition or conceit, but in lowliness of mind let each esteem others better than himself. Let each of you look out not only for his own interests, but also for the interests of others."