One whose tender age should express to them the innocence which they should have. But truly He set Himself in the midst of them, a little one who had come “not to be ministered unto, but to minister,” [Matt 20:28] that He might be a pattern of holiness.
Others interpret [margin note: see Origen in loc.] the little one of the Holy Spirit whom He set in the hearts of His disciples, to change their pride into humility. “And he said, Verily I say unto you, Except ye be converted, and become as little children, ye shall not enter into the kingdom of heaven.”
He does not enjoin on the Apostles the age, but the innocence of infants, which they have by virtue of their years, but to which these might attain by striving; that they should be children in malice, not in understanding. As though He had said, As this child, whom I set before you as a pattern, is not obstinate in anger, when injured does not bear it in mind, has no emotion at the sight of a fair woman, does not think one thing while he speaks another; so ye, unless ye have the like innocence and purity of mind, shall not be able to enter into the kingdom of heaven.
Reproduced in full. Translation: Oxford 1841 (Newman), public domain (Public domain).