That is why I told you that you would die in your sins. For unless you believe that I am He, you will die in your sins.”
24. You shall die in your sins. Having formerly employed the singular number, in your sin, he now resorts to the plural number, in your sins; but the meaning is the same, except that in the former passage he intended to point out that unbelief is the source and cause of all evils.
Christ here gives fair warning to the careless unbelieving Jews to consider what would be the consequence of their infidelity, that they might prevent it before it was too late; for he spoke words of terror as well as words of grace. Observe here, I. The wrath threatened (Joh 8:21): Jesus said again unto them that which might be likely to do them good.
Commenting on John 8:21-30
I have many things to say, and to judge of you,.... Being God omniscient, he knew their persons and actions, their lives and conversations, and all their sins and transgressions, which he could justly have complained of, and charged them with, and proved against them, and judged and condemned them for; but this was not his present business, he came not to judge and condemn...