Whosoever therefore. This verse gives a direct application of the principle just enunciated, and supplies an answer to the apostles' question. Shall humble himself. Not that a child consciously humbles itself, but is humble by nature.
The disciple must become that by deliberate choice which the child is by reason of his constitution and natural disposition. The same is greatest; rather, greater ( μει ìζων), Christ using the same term as the questioners in Matthew 18:1.
The more a man annihilates self and casts away pride, conceit, obstinacy, the fitter is he to become a living member of Christ's kingdom. "Quanto humilior, tanto altior," says Thomas Aquinas. But this is a joint work.
St. Gregory says well, "The good which a man doeth is both the work of God and the work of man: of God, as being the Author, in giving grace; of man, as being actor, in using grace, yet so that he cooperate with grace by grace" (quoted by Ford, in loc.
).