Augustine of Hippo

(Tr. xxii. s. 9) But some one will ask, Hath the Son life, whence those who believe will live? Hear His own words: As the Father hath life in Himself, so hath He given to the Son to have life in Himself. Life is original and absolute in Him, cometh from no other source, dependeth on no other power. He is not as if He were partaker of a life, which is not Himself; but has life in Himself: so as that He Himself is His own life. Hear, O dead soul, the Father, speaking by the Son: arise, that thou mayest receive that life which thou hast not in thyself, and enter into the first resurrection. For this life, which the Father and the Son are, pertaineth to the soul, and is not perceived by the body. The rational mind only discovers the life of wisdom.