It is a pilot’s will that advances the throttles to increase the thrust of his or her aircraft’s engines. That said, the power itself has nothing to do with that pilot.
The only responsibility we have as Christians is to truly accept the fact that our old transgressing nature has been crucified with Christ. It is coming to stand on this truth that we will finally find the power not to sin.
Yes, we must will ourselves to believe it, but the power itself is a function of the presence of the crucified and risen Savior dwelling in our hearts.
As we progressively reckon our remaining “old man” as dead through the realization of our crucifixion with Jesus we will begin to know true victory over sin.
“Finally, be strong in the Lord and in the strength of his might.” -Ephesians 6:10 (ESV)


