Does grace make you passive?

Fully God, fully man – did Christ have the “capacity” to sin? Does the grace of God make some people go passive? Why didn’t God heal Paul? What did God mean by “My grace is sufficient”?

“Jesus did it all. So what do we do?”

Can we have an ongoing sin struggle yet be genuinely saved? What can we do about vengeful or violent thoughts we get? If Jesus did it all, is there anything that we do? What’s our role?