Romans 12:3
And because of God's unearned favor shown to me [i.e., in appointing me to be an apostle], I am telling every person among you not to think he is more important than he really is. Instead, he should have a sensible estimate [of his gifts] in harmony with the degree of faith God has given to each person.
Romans 12:10
In your love for your brothers, show tender affection toward one another. Try to outdo one another in showing respect [for each other].
Philippians 2:3
Do not do anything from rivalry or from empty conceit, but in humility, consider others better than yourselves.
Philippians 2:14
Do everything without complaining and arguing,
1 Peter 5:5
And in the same way, you younger [Christians] should be [respectfully] submissive to the older ones. And all of you should [be willing to] humbly serve one another, for God stands opposed to [the efforts of] proud people, but extends His unearned favor to those [who serve] with humility.