Augustine of Hippo — as excerpted in the Catena Aurea on Luke 18:15-17

“(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.”