"We're always being measured: God is measuring us, and people are measuring us. When it comes to measuring Christian service and servants, other people can make mistakes, and we can make mistakes. Most Christian workers are prone to think either more highly of themselves than they should (Rom 12:3) or less highly. If we think too highly of outselves, we'll get proud and start pushing our way into what we think is a more important place. If we think less highly, we'll get discouraged and want to quit. Both attitudes are wrong."
Warren W. Wiersbe, On Being a Servant of God (Grand Rapids: Baker, 1993), 59.