All the wisdom and knowledge in the universe demanded the existence of God.
He came out of knowledge and wisdom to cause order out of disorder.

He then created all things separating evil from good, purging all evil from Himself and becoming pure Love.
He made a place for all things good (heaven), He made a place for all things evil (hell), and he made a place where all things go to decide where they want to be for eternity (earth).
Here, you decide your fate, an eternity of death in hell, or an eternity of love and life with God when heaven and earth become one.

If you were 100% knowledge, it is only natural and wise that you would purge everything out of you that is unnecessary out of you. Evil causes death, good causes life, and God made a way where we can exist and become perfect through faith in His Son the Christ.
God created spiritual laws to cause order in the heavens and all things must obey those laws, what ever does not it cast away for eternity.