We often make two mistakes when it comes to our assessing our leadership. One, we overestimate our contribution. Two, we underestimate our contribution.
Let me propose a third-we fail to acknowledge God's appointing us to our leadership position. In Job 12 you'll find a pretty comforting/disturbing perspective on how small our contribution and how LARGE God's is to our leadership position.
It's not about us--it's about Him.
As Andy Stanley says: "Leadership is stewardship, it is temporary. You're accountable."