1 What is it, Brethren, which we have heard the Lord saying, “He that believes in Me, believes not on Me, but on Him that sent Me”? It is good for us to believe in Christ, especially seeing that He has also Himself expressly said this which you have now heard, that is, that “He had come a Light into the world, and whosoever believes in Him shall not walk in darkness, but shall have the light of life.” Good then it is to believe in Christ; and a great evil it is not to believe in Christ. But because Christ the Son is, Whatsoever He is, of the Father, but the Father is not of the Son, but is the Father of the Son; He recommends to us indeed faith in Himself, but refers the honour to His Original.
Source: Sermons on Selected Lessons of the New Testament (New Advent)