The word 'hardened' here isn't just about stubbornness; it points to a specific, active work of God in response to rejection.
Paul uses a strong word to describe the fate of those in Israel who did not belong to the elect remnant: "the rest were hardened."
Beyond Simple Stubbornness
The original language here points to more than just being pig-headed. It describes a state of being made insensitive, like bone becoming calcified or a cataract forming over the eye. It’s a spiritual insensitivity that prevents understanding or response.
God's Role in Hardening
Crucially, the verse presents this hardening as something that happened to them, not solely something they . While people actively reject God, Paul here, in line with Old Testament themes, indicates that God can, in His sovereign judgment, give people over to the consequences of their rejection, leading to a state of spiritual hardness.