John Calvin Commentary Matthew 24:25

"Behold, I have told you beforehand." — Matthew 24:25 (ASV)

Lo, I have foretold it to you. Mark expresses our Lord’s meaning more fully. But take heed: lo, I have foretold you all things. By these words we are taught that those who are dismayed by the stumbling blocks which Christ predicted are altogether inexcusable. For since the will of God ought to be our rule, it is sufficient that we have received timely warning that such is his pleasure.

Again, as he declares that he is faithful, and will not suffer us to be tempted beyond what we are able to bear (1 Corinthians 10:13), we shall never lack strength to resist, provided that our weakness is not nourished by indifference.