2 Corinthians 10:12:

For we dare not make ourselves of the number, or compare ourselves with some that commend themselves: but they measuring themselves by themselves, and comparing themselves among themselves, are not wise.

See also:

Pros and Cons of Being on TV
Beating Ministerial Jealousy and Insecurity
Objection: Earlier Lists of Spiritual Gifts Contain Miraculous Gifts, But Later Ones Do Not