Think of the Father as a spring of life begetting the Son like a river and the Holy Ghost like a sea, for the spring and the river and sea are all one nature. Think of the Father as a root, and of the Son as a branch, and the Spirit as a fruit, for the substance in these three is one. The Father is a sun with the Son as rays and the Holy Ghost as heat.
John of DamascusHe who does not believe according to the tradition of the Catholic Church is an unbeliever.
John of DamascusO Mother of God! If I place my confidence in thee, I shall be saved; if I am under thy protection, I have nothing to fear; for the fact of being thy client is a possession of a certainty of salvation which God grants only to those whom He intends to save.
John of DamascusChrist sits in the body at the right hand of God the Father, but we do not hold that the right hand of the Father is actual place. For how could He that is uncircumscribed have a right hand limited by place? But we understand the right hand of the Father to be the glory and honor of the Godhead in which the Son of God, Who existed as God before the ages, and is of like essence to the Father, and in the end became flesh, has a seat in the body, His flesh sharing in the glory. For He along with His flesh is adored with one adoration by all creation.
John of DamascusIn former times, God, who is without form or body, could never be depicted. But now when God is seen in the flesh conversing with men, I make an image of the God whom I see. I do not worship matter; I worship the Creator of matter who became matter for my sake.
John of DamascusThe whole earth is a living icon of the face of God. ... I do not worship matter. I worship the Creator of matter who became matter for my sake, who willed to take His abode in matter, who worked out my salvation through matter. Never will I cease honoring the matter which wrought my salvation! I honor it, but not as God. Because of this I salute all remaining matter with reverence, because God has filled it with his grace and power. Through it my salvation has come to me.
John of Damascus