The first thing that we are taught in these verses, is the necessity of conversion, and of conversion manifested by childlike humility. The disciples came to our Lord with the question, “Who is the greatest in the kingdom of heaven?” They spoke as men half-enlightened, and full of worldly expectations. They received an answer well calculated to awaken them from their day-dream. An answer containing a truth which lies at the very foundation of Christianity: “Except ye be converted and become as little children, ye shall not enter into the kingdom of heaven.”
Let these words sink down deeply in our hearts. Without conversion there is no salvation. We all need an entire change of nature: of ourselves we have neither faith, fear, nor love towards God. We “must be born again” (John 3:8). Of ourselves we are utterly unfit for dwelling in God’s presence. Heaven would be no heaven to us if we were not “converted.” It is true of all ranks, classes and orders of mankind: all are born in sin and children of wrath, and all, without exception, need to be born again and made new creatures. A new heart must be given to us, and a new spirit put within us; old things must pass away, and all things must become new. It is a good thing to be baptized into the Christian Church, and use Christian means of grace, but after all, “are we converted?”