If you are a Christ-follower, your existence revolves around loving God (Deu 6:4-6). As a spiritual leader, your key responsibility is to transfer that truth to your spiritual children (Deu 6:7-9).
…thou shalt teach them diligently…
If you were absolutely certain of success, how would you serve the Lord? Do you hesitate because of doubt or fear? When you do, it’s a sign you are leaning on yourself too much.
The things which are impossible with men are possible with God.
Secure leaders realize that their own strength is limited. They understand they are like a glove. A glove does nothing without a hand inside.
Not by might, nor by power, but by my spirit, saith the LORD of hosts.