Verse 8. - Therefore let us keep the feast. Let us keep the Christian feast of Christ's resurrection in that spirit of holiness - of purging away sin from the midst of us - which was symbolized by the Jewish removal of leaven. Not with old leaven. For now ye are "in Christ," We do not, as Christians, keep the Passover since it is the celebration of the sacrificial blood covering our sins. In Christ, His righteous innocent blood does not cover but takes them away. It is purged! Simple enough- our sin is ERADICATED, not COVERED.