Will-Power is making a decision and choice to control ones destiny. 

Will Power is determination,energy and enthusiasm to accomplish my life goals.

You must make up your own mind to press forward, God will give you the help you need to make it happen!

Isaiah 1:19-20 (amp)

If you are willing and obedient, you shall eat the good of the land;²⁰But if you refuse and rebel, you will be devoured by the sword. For the mouth of the Lord has spoken it.

Isaiah 1:19-20 (message)

vs 19 If you’ll willingly obey,
   you’ll feast like kings.
But if you’re willful and stubborn,
   you’ll die like dogs.”
That’s right. God says so.