Origen
Catena Aurea · Matthäusevangelium 18
At the same time came the disciples unto Jesus, saying, Who is the greatest in the kingdom of heaven? And Jesus called a little child unto him, and set him in the midst of them, And said, Verily I say unto you, Except ye be converted, and become as little children, ye shall not enter into the kingdom of heaven. Whosoever therefore shall humble himself as this little child, the same is greatest in the kingdom of heaven. And whoso shall receive one such little child in my name receiveth me. But whoso shall offend one of these little ones which believe in me, it were better for him that a millstone were hanged about his neck, and that he were drowned in the depth of the sea.
Herein we ought to be imitators of the disciples, that when any question of doubt arises among us, and we find not how to settle it, We should with one consent go to Jesus, Who is able to enlighten the hearts of men to the explication of every perplexity. We shall also consult some of the doctors, who are thought most eminent in the Churches. But in that they asked this question, the disciples knew that there was not an equality among the saints in the kingdom of heaven; what they yet sought to learn was, how they were so, and lived as greater and less. Or, from what the Lord had said above, they knew Who was the best and who was great; but out of many great, who was the greatest, this Was not clear to them.