"Do you know yourself to be weak? Inadequate? Not up to snuff in intellect, family background, educational opportunities, financial resources?
Get ready.
You are just the kind of person God loves to use. The power of God—power to kill sin, power to walk in the fullness of the Spirit, power to speak courageously on the job, power to love the unlovely, power to lead many to Christ, power to make your life count—such power is for inadequate people.
Acknowledge your frailty to God. Look to the Savior. He embraced the weakness of the cross so that you and I, weak sinners, can experience the blood-bought power of God—now"

Dane Ortlund, Finding strength in your weakness (read the full thing here)