For as Jonas was a sign to the Ninevites,.... As he was by lying three days and three nights in the whale's belly, and then cast on shore alive; which sign, or miracle was wrought to confirm his mission and message, and to engage the Ninevites to give credit to him, and repent, or they might assure themselves they would be utterly destroyed;

so shall also the son of man be to this generation; by lying three days and three nights in the heart of the earth, and then rising again from the dead the third day; and which should be done to confirm the truth of his Messiahship, and to declare him to be the Son of God with power, and to engage persons to believe in him; and to assure that wicked generation, that in case they remained, after such a sign, impenitent and unbelieving, wrath would come upon them to the uttermost; see Matthew 12:40.

A sign to the Ninevites

Compare Matthew 12:40.

For as Jonas was a sign unto the Ninevites, so shall also the Son of man be to this generation.

11:29-32 They seek a sign. See notes on Mt 12:38-42, where we have the same language reported.

Margin the Son of man

See Scofield Note: "Mt 8:20".

11:29-36 Christ promised that there should be one sign more given, even the sign of Jonah the prophet; which in Matthew is explained, as meaning the resurrection of Christ; and he warned them to improve this sign. But though Christ himself were the constant preacher in any congregation, and worked miracles daily among them, yet unless his grace humbled their hearts, they would not profit by his word. Let us not desire more evidence and fuller teaching than the Lord is pleased to afford us. We should pray without ceasing that our hearts and understandings may be opened, that we may profit by the light we enjoy. And especially take heed that the light which is in us be not darkness; for if our leading principles be wrong, our judgment and practice must become more so.