Thomas Aquinas,
Summa Theologiae — Question 99 - OF THE CONDITION OF THE OFFSPRING AS TO THE BODY…
“ I answer that, By faith alone do we hold truths which are above nature, and what we believe rests on authority. Wherefore, in making any assertion, we must be guided by the nature of things, except in those things which are above nature, and are made known to us by Divine authority. Now it is clear that it is as natural as it is befitting to the principles of human nature that children should not have sufficient strength for the use of their limbs immediately after birth. Because in proportion to other animals man has naturally a larger brain. ”
