Titus 1:9 He must hold firm to the trustworthy word as taught, so that he may be able to give instruction in sound doctrine and also to rebuke those who contradict it. 

Matthew 20:28  just as the Son of Man did not come to be served, but to serve, and to give his life as a ransom for many.”

1 Timothy 3:8a In the same way, deacons are to be worthy of respect

1 Timothy 4:12

Don’t let anyone look down on you because you are young, but set an example for the believers in speech, in conduct, in love, in faith and in purity.

Matthew 18:2-3 

He called a little child to him, and placed the child among them.  And he said: “Truly I tell you, unless you change and become like little children, you will never enter the kingdom of heaven.