[21] "I shall harden": Not by being the efficient cause of his sin; but by withdrawing from him, for his just punishment, the dew of grace that might have softened his heart; and so suffering him to grow harder and harder.
[24] "The Lord met him, and would have killed him": This was an angel representing the Lord, who treated Moses in this manner, for having neglected the circumcision of his younger son; which his wife understanding, circumcised her child upon the spot, upon which the angel let Moses go.