Disowning your father means (a) you are lying and (b) you want nothing to do with him. You have broken off the relationship.
See, a child of God can't do that lol... because they know their Father will always be their Father. Even with our earthly fathers...it's impossible for you to stop believing he's your father... it's IMPOSSIBLE... unless you had brain damage and altimeters... but to choose to do it? You can't. Even if you try really, really hard, you can't stop believing. When you are GODS, you will ALWAYS be God's. There's no chance of ever turning back and 'un' believing.