'Wills' in the Bible

When we were living in the flesh [trapped by sin], the sinful passions, which were awakened by [that which] the Law [identifies as sin], were at work in our body to bear fruit for death [since the willingness to sin led to death and separation from God].

but I see a different law and rule of action in the members of my body [in its appetites and desires], waging war against the law of my mind and subduing me and making me a prisoner of the law of sin which is within my members.

So then it is not of him that wills, nor of him that runs, but of God that shews mercy.

So then, He shows mercy to those He wants to, and He hardens those He wants to harden.