Here is the crux of attempting to grasp the enormity of what Jesus did. All real wills can go in either direction. They don't have to make the right choice. There is no coercion. That is the definition of free will. It is truly free to choose.
From Jesus an Obedient Son by Michael Phillips. Read by Michael Kimball. More information on this and similar writings may be found at Father of the Inklings. Visit Amazon to purchase Jesus an Obedient Son and other books by Michael Phillips.