“They said to him therefore, ‘Where is your Father?’ Jesus answered, ‘You know neither me nor my Father. If you knew me, you would know my Father also.’”
This is not in any way meant to negatively poke fun at John Piper. It's meant to be a light-hearted way of reflecting on God's truths spoken through this vessel of God's mercy.
God is most glorified in us when we are most satisfied in Him.