Whether Christ's body was animated in the first instant of its conception?

❌ Objection 1 : It would seem that Christ's body was not animated in the first instant of its conception. For Pope Leo says (Ep. ad Julian.): "Christ's flesh was not of another nature than ours: nor was the beginning of His animation different from that of other men." But the soul is not infused into other men at the first instant of their conception. Therefore neither should Christ's soul have been infused into His body in the first instant of its conception.

❌ Objection 2 : Further, the soul, like any natural form, requires determinate quantity in its matter. But in the first instant of its conception Christ's body was not of the same quantity as the bodies of other men when they are animated: otherwise, if afterwards its development had been continuous, either its birth would have occurred sooner, or at the time of birth He would have been a bigger child than others. The former alternative is contrary to what Augustine says (De Trin. iv), where he proves that Christ was in the Virgin's womb for the space of nine months: while the latter is contrary to what Pope Leo says (Serm. iv in Epiph.): "They found the child Jesus nowise differing from the generality of infants." Therefore Christ's body was not animated in the first instant of its conception.

❌ Objection 3 : Further, whenever there is "before" and "after" there must be several instants. But according to the Philosopher (De Gener. Animal. ii) in the generation of a man there must needs be "before" and "after": for he is first of all a living thing, and afterwards, an animal, and after that, a man. Therefore the animation of Christ could not be effected in the first instant of His conception.