In John of Damascus— Parallel— Vol. II. p. 307
The fear of God, who is impassible, is free of perturbation. For it is not God that one dreads, but the falling away from God. He who dreads this, dreads falling into what is evil, and dreads what is evil. And he that fears a fall wishes himself to be immortal and passionless.
Source: Fragments (New Advent)