Everything will be revealed at the end --- Faith, Hope and Love. But the greatest of all this is Love.
Everything that we are now is a collection of all our experiences...
If we understand everything about God then He is a small God. But He is not. God is so great to be understood by the brains of His creatures.
We can perceive 4 dimensions including time... more than that it is difficult. Math and intellectual information can be up to approximately 10 dimensions... But God's character is infinite. How can we understand Him totally? Good thing is He revealed Himself through Jesus. We are blessed!
A subset B: I am in the Father (John 14:10)
B subset A: The Father is in me (John 14:10)
A=B: The Father and I are one (John 10:30)