Whether there was any interval between the creation and the fall of the angel?

Objections

Objection 1 : It would seem that there was some interval between the angel's creation and his fall. For, it is said (Ezech. 28:15): "Thou didst walk perfect [*Vulg.: 'Thou hast walked in the midst of the stones of fire; thou wast perfect . . .'] in thy ways from the day of thy creation until iniquity was found in thee." But since walking is continuous movement, it requires an interval. Therefore there was some interval between the devil's creation and his fall.
Objection 2 : Further, Origen says (Hom. i in Ezech.) that "the serpent of old did not from the first walk upon his breast and belly"; which refers to his sin. Therefore the devil did not sin at once after the first instant of his creation.
Objection 3 : Further, capability of sinning is common alike to man and angel. But there was some delay between man's formation and his sin. Therefore, for the like reason there was some interval between the devil's formation and his sin.
Objection 4 : Further, the instant wherein the devil sinned was distinct from the instant wherein he was created. But there is a middle time between every two instants. Therefore there was an interval between his creation and his fall.