Whether anyone may be blotted out of the book of life?

Objections

Objection 1 : It seems that no one may be blotted out of the book of life. For Augustine says (De Civ. Dei xx, 15): "God's foreknowledge, which cannot be deceived, is the book of life." But nothing can be taken away from the foreknowledge of God, nor from predestination. Therefore neither can anyone be blotted out from the book of life.
Objection 2 : Further, whatever is in a thing is in it according to the disposition of that thing. But the book of life is something eternal and immutable. Therefore whatsoever is written therein, is there not in a temporary way, but immovably, and indelibly.
Objection 3 : Further, blotting out is the contrary to inscription. But nobody can be written a second time in the book of life. Neither therefore can he be blotted out.