Catechism of the Catholic Church

St. Gregory of Nazianzus, also called "the Theologian," entrusts this summary of Trinitarian faith to the catechumens of Constantinople: (236, 684, 84) > Above all guard for me this great deposit of faith for which I live and fight, which I want to take with me as a companion, and which makes me bear all evils and despise all pleasures: I mean the profession of faith in the Father and the Son and the Holy Spirit. I entrust it to you today. By it I am soon going to plunge you into water and raise you up from it. I give it to you as the companion and patron of your whole life. I give you but one divinity and power, existing one in three, and containing the three in a distinct way. Divinity without disparity of substance or nature, without superior degree that raises up or inferior degree that casts down... the infinite co-naturality of three infinites. Each person considered in himself is entirely God... the three considered together.... I have not even begun to think of unity when the Trinity bathes me in its splendor. I have not even begun to think of the Trinity when unity grasps me....