But Theodotus of Byzantium introduced a heresy of the following description, alleging that all things were created by the true God; whereas that Christ, he states, in a manner similar to that advocated by the Gnostics already mentioned, made His appearance according to some mode of this description. And Theodotus affirms that Christ is a man of a kindred nature with all men, but that He surpasses them in this respect, that, according to the counsel of God, He had been born of a virgin, and the Holy Ghost had overshadowed His mother. This heretic, however, maintained that Jesus had not assumed flesh in the womb of the Virgin, but that afterwards Christ descended upon Jesus at His baptism in form of a dove. And from this circumstance, the followers of Theodotus affirm that at first miraculous powers did not acquire operating energy in the Saviour Himself. Theodotus, however, determines to deny the divinity of Christ. Now, opinions of this description were advanced by Theodotus.
Reproduced in full. Translation: Ante-Nicene Fathers, vol. 5 (Roberts and Donaldson, 1886), public domain (Public domain).