[dropit_sphere]

This is more a disagreement about fact than it is a threat.

"Take care of your body or else it will grow weak and sick" has a directive and a warning of consequences---is it a threat?

[kelnos]

Your example isn't a threat because there is no external/conscious actor who is going to cause your body to grow weak and sick if you don't take care of it; it will just happen as a consequence of normal biological processes.

There need not be a consequence of failing to follow the Christian Bible; God/Satan have decided that there will be consequences, and Satan will be the one torturing you if you don't do what God says. That's definitely a threat. In these stories, God and Satan are conscious, sentient beings with free will. They can choose to reward or punish you based on whatever criteria they've decided.

[lelandfe]

Your questioning here rhymes with what drove me from the church:

If God is good, why do bad things happen?

I never got an answer that resonated with me. Wound up not pursuing theology.