3 Moreover, belief in divine Scripture declares to us, that among all, whether infants or those who are older, there is the same equality of the divine gift. Elisha, beseeching God, so laid himself upon the infant son of the widow, who was lying dead, that his head was applied to his head, and his face to his face, and the limbs of Elisha were spread over and joined to each of the limbs of the child, and his feet to his feet. If this thing be considered with respect to the inequality of our birth and our body, an infant could not be made equal with a person grown up and mature, nor could its little limbs fit and be equal to the larger limbs of a man.
But in that is expressed the divine and spiritual equality, that all men are like and equal, since they have once been made by Cool; and our age may have a difference in the increase of our bodies, according to the world, but not according to God; unless that very grace also which is given to the baptized is given either less or more, according to the age of the receivers, whereas the Holy Spirit is not given with measure, but by the love and mercy of the Father alike to all. For God, as He does not accept the person, so does not accept the age; since He shows Himself Father to all with well-weighed equality for the attainment of heavenly grace.
Source: The Epistles of Cyprian (New Advent)