If furthermore, the Son was present since eternity, then how could He be procreated? And when the Holy Spirit was also there since eternity, how could He then come forth from the Father and the Son and have His beginning in Them. If according to your mind and reason the three divine persons – contested by you, of whom the future people could easily make three Gods – are all three eternal, that means without a beginning, then one of them could not have given the beginning of his existence to the others. – The Great Gospel of John, Book 8, Chapter 27, Paragraph 1