There is more to know! Wonderful sermon and he sounds like a wonderful man. He said all that there is to know about the Father can be known by seeing what the scriptures say about Christ. After all, I'll add, the Son of God IS the Word of God (John 1). But, there's more, much more.
"I still have many things to say to you, but you cannot bear them now. When the Spirit of truth comes, he will guide you into all the truth, for he will not speak on his own authority, but whatever he hears he will speak, and he will declare to you the things that are to come. (John 16:12, 13 ESV)
Pray that the Spirit of God will reveal the deep things of God to you. For we have been given this Spirit and we have the mind of Christ, but it is for the mature (1 Cor 2). Humble yourselves, therefore, and diligently seek Him, for He desires to be sought and will reward such as these.