Augustine of Hippo
Catena Aurea · Lukasevangelium 18
And they brought unto him also infants, that he would touch them: but when his disciples saw it, they rebuked them. But Jesus called them unto him, and said, Suffer little children to come unto me, and forbid them not: for of such is the kingdom of God. Verily I say unto you, Whosoever shall not receive the kingdom of God as a little child shall in no wise enter therein.
(Serm. 115.) To whom are they brought to be touched, but to the Saviour? And as being the Saviour they are presented to Him to be saved, who came to save that which was lost. But with regard to these innocents, when were they lost? The Apostle says, By one man sin entered into the world. (Rom. 5:12.) Let then the little children come as the sick to a physician, the lost to their Redeemer.