Lactantius

“ But when he saw that a wonderful system of providence is contained in all things which breathe, what vanity was it (O mischievous one!) to say that there had been animals of immense size, in which the system of production ceased!
Since, therefore, all things which we see are produced with reference to a plan—for nothing but a plan [2] can effect this very condition of being born—it is manifest that nothing could have been born without a plan. For it was previously foreseen in the formation of everything, how it should use the service of the limbs for the necessaries of life ”

“ For it is plain that this use could have no existence, unless all the limbs had been made with such arrangement and foresight, that they might be able to have their use.
For what if you should say, that birds were not made to fly, nor wild beasts to rage, nor fishes to swim, nor men to be wise, when it is evident that living creatures are subject to that natural disposition and office to which each was created? But it is evident that he who has lost the main point itself of the truth must always be in error. ”

“ But since all the races of animals, and all the limbs, observe their own laws and arrangements, and the uses assigned to them, it is plain that nothing is made by chance, since a perpetual arrangement of the divine plan is preserved. ”