We are saved by grace―free, sovereign, divine, and eternal grace―not by our sense of grace. We are sheltered by the blood, not by our estimate of the blood. Jehovah did not say on that awful night, "When you see the blood, and estimate it as you ought, I will pass over you." Nothing of the kind. That is not the way of our God.
He wanted to shelter His people and to let them know that they were sheltered―perfectly, because divinely sheltered. Therefore He placed the matter wholly upon a divine basis. He takes it entirely out of their hands by assuring them that their safety rested, simply and entirely, upon the blood and upon His estimate of it. He gives them to understand that they had nothing whatever to do with providing the shelter.
It was His to provide. It was theirs to enjoy.
"Saved by grace alone!
This is all my plea:
Jesus died for all mankind,
And Jesus died for me.”