Luke 10:20

But because the joy with which He saw them rejoice savoured of vain-glory, for they rejoiced that they were as it were exalted, and were a terror to men and evil spirits, our Lord therefore adds, Notwithstanding in this rejoice not, that the spirits are subject unto you, &c.

(in Esai. 4.) There are some who are written indeed not in life, but according to Jeremiah in the earth, (Jer. 17:13.) that in this way there might be a kind of double enrolment, of the one indeed to life, but of the other to destruction. But since it is said, Let them be blotted out of the book of the living, (Ps. 69:28.) this is spoken of those who were thought worthy to be written in the book of God. And in this way a name is said to be put down in writing or blotted out, when we turn aside from virtue to sin, or the contrary.

Why, O Lord, dost not Thou permit men to rejoice in the honours which are conferred by Thee, since it is written, In thy name shall they rejoice all the day? (Ps. 89:16.) But the Lord raises them up by greater joys. Hence He adds, But rejoice that your names are written in heaven.

They are forbidden to rejoice in the subjection of the spirits to God, since they were flesh; for to cast out spirits and to exercise other powers is sometimes not on account of his merit who works, but is wrought through the invocation of Christ's name to the condemnation of those who mock it, or to the advantage of those who see and hear.

As if he said, It becomes you to rejoice not in the putting down of the evil spirits, but in your own exaltation. But it would be well for us to understand, that whether a man has done heavenly or earthly works, he is thereby, as if marked down by letter, for ever fixed in the memory of God.