Matteo 8:12

but the children of the Kingdom shall be cast out into outer darkness; there shall be weeping and gnashing of teeth.

Any evidence of implicit, trusting faith always affected Jesus very deeply, Matthew 15:28. He was here filled with great surprise and wonder. Not even in Israel, where such faith, such remarkable trust in His power, ought to be the rule, Romans 3:2; Romans 9:5, had He found such belief.

This extraordinary situation causes Him to utter a prophecy concerning the conversion of the Gentiles, which reflected in a very uncomplimentary way upon His own countrymen. In the form of a parable He represents the kingdom of God as a great festival, or feast, where the riches of God's mercy would be dispensed with a full hand. The heathen centurion represents, as it were, the first-fruits of the great multitudes whom the Lord would call from all kindreds, and tongues, and peoples, and nations, to recline at His tables and partake of His gifts, with the patriarchs, the fathers of the faithful of all times.

In the meantime, the children of the Kingdom, the sons of those to whom the promises were made, the Jews that were depending upon their earthly relationship to the fathers without their faith, would lose their heritage, because they will not accept Jesus as their Savior. Outer darkness instead of the light of heaven, weeping in a repentance that came too late, gnashing the teeth in impotent rage, that would be their lot. That is, to this day, the expectancy of all unbelievers.