The infinity of the Father

God is ultimately unknowable (i.e., incomprehensible) in His essence, precisely because of His infinity: created beings can never come to know fully The Uncreated Being, because Infinity keeps on revealing Himself infinitely. However, God both can and is knowable, in and through His uncreated energies, by His created beings, while the latter are still alive on earth. The latter is a process of grace, of mutual ascent and descent, called deification.