Evolutionism says just the opposite. Is not the whole
notion of development a process from the imperfect to the
perfect? But the eternal question abides -- What begot the
first germ, containing in itself the promise and potency of
the vast development which we see? St Thomas asserts a
priority of nature of the perfect to the imperfect,
not a priority of time. God, though prior in
duration, is not prior in time to the creature,
as He is not in time at all: there is no time antecedent to
creation. In the series of created causes, the imperfect is
doubtless prior in time to the perfect. The first
verses of Genesis assure us of that, as well as all sound
study of evolution.
Of God and His Creatures: 1.44