[It's a subtle knife, but it still cuts. Steve nods once, brusquely.]

All right. The Infinity Gem represents Time. Anyone holding it can manipulate it, stop it, go back or forward. It grants virtual omniscience. For obvious reasons, I need to keep it out of the wrong hands.

[He hesitates.]

I'm not against telling him. The other-- Robin. But I'd prefer to meet him first and decide for myself if it's the right call.