Socinianism is a heresy concerning the nature of God. It is derived from two brothers of the surname Sozinni who lived in the 1500's in Poland. Socinianism denies the doctrine of the Trinity--claiming it denies the simplicity of God's unity. Instead, God is a single person with the Holy Spirit as the power of God. Since it emphasizes the unity of God, there could be no divine and human union in a single person as Christ. Therefore, Socinianism denies the incarnation and deity of Christ as well as Christ's pre-existence. It teaches that Jesus was only a man. However, as is separate from the Unitarians, it taught that Jesus was a deified man and was to be adored as such. Nevertheless, since Jesus is not divine by nature, His sacrifice was not efficacious; that is, it did not result in the redemption of people who would trust in it. Instead it was an example of self-sacrifice. The followers of Socinianism also rejected infant baptism and hell and taught the annihilation of the wicked. The Bible was authoritative but was only properly understood through rationalism.