John 8:21

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. He continued to teach, in kindness to those few who received his doctrine, though there were many that resisted it, which is an example to ministers to go on with their work, notwithstanding opposition, because a remnant shall be saved. Here Christ changes his voice; he had piped to them in the offers of his grace, and they had not danced; now he mourns to them in the denunciations of his wrath, to try if they would lament. He said, I go my way, and you shall seek me, and shall die in your sins. Whither I go you cannot come. Every word is terrible, and bespeaks spiritual judgments, which are the sorest of all judgments; worse than war, pestilence, and captivity, which the Old Testament prophets denounced. Four things are here threatened against the Jews. 1. Christ's departure from them: I go my way, that is, "It shall not be long before I go; you need not take so much pains to drive me from you, I shall go of myself.

— Matthew Henry's Concise Commentary (public domain)

Then said Jesus again unto them, I go my way, &c.--(See on Joh 7:33).

— Jamieson-Fausset-Brown Commentary (public domain)