[RobbyS]

Could be because Matthew and Paul saw things differently?

[Jael]

Matthew was written to the Jews. Not the Gentiles. It does not contain Grace, because Christ was preaching to show them how much their works had failed them.

Also consider that Christ had not died yet, so the church, which is the Body of Christ, had not begun.

Different messages to different people.

Hebrews 9:16  For where a testament is, there must also of necessity be the death of the testator.

17  For a testament is of force after men are dead: otherwise it is of no strength at all while the testator liveth.