Who was Origen of Alexandria?

I would like to introduce readers to this philosopher. His name was Origen and he lived from 185-254AD. He was a writer and teacher of early Christianity and is considered to be the Father of Christian mysticism. He believed in reincarnation and the three aspects of the trinity, as Father, Son and Holy Spirit. He believed that those in power should pray, yet not pray for material goods but a better understanding of God.