Monoimus' cosmological system was partially derived from that of the Pythagoreans, he believed that God and man have a unique unity and that man must look into his soul to find God rather than outwardly.
Hippolytus claims that Monoimus was a follower of Tatian, and that his cosmological system was derived from that of the Pythagoreans, which indeed seems probable. Monoimus is famous for his quote about the unity of God and man (from Hippolytus): It follows that it is a mistake to look for God in creation; we must seek Him in ourselves, and can best find Him by the study of the involuntary operations of our own soul. 
