In Love and Responsibility, Karol Wojtyla talks about the nature of the human person. As spiritual and bodily beings, we have the gifts of reason and free will.
He makes a crucial point: No one can will for me -- no one, not even God.
Yes, it's such a mystery that God does not force us to choose him. KW says, "If God intends to direct man to some ends, first and foremost he lets him know these ends, so that man can make them his own and strive for them on his own.
"In this, among others, lies the deepest logic of Revelation: God lets man know the supernatural end, but the decision to strive for this end, its choice, is left to man's freedom. Therefore, God does not save man against his will" (p. 11).
God invites, sometimes he even cajoles, but he never forces us. What an amazing mystery. It also throws light on the problem of evil and sin, because God doesn't force us to be good.
It is up to each one of us to choose God and goodness. No one else can do it for me.