Origen

“ So too, moreover, one will humble himself like the little child which Jesus called; for neither haughtiness, nor conceit in respect of noble birth, or wealth, or any of those things which are thought to be good, but are not, comes to a little child. Wherefore you may see those who are not altogether infants, up to three or four years of age, like to those who are of mean birth, though they may seem to be of noble birth, and not appearing at all to love rich children rather than the poor. ”

“ As, then, it has been accurately demonstrated also by others, that no passion is incident to the little children who have not yet attained to full possession of reason; and if no passion, clearly fear also; but, if there be anything corresponding to the passions, these are faint, and very quickly suppressed, and healed in the case of little children, so that he is worthy of love, who, being converted as the little children, has reached such a point as to have, as it were, his passions in subjection like the little children. ”

“ And the like you will say about what is called pleasure, in regard to which the wicked are irrationally lifted up, from which little children do not suffer, nor such as have been converted and become as little children. ”