Recently in my readings for class, I came across this great statement by Pierre Marcel regarding the Trinity:
“In confessing the the Trinitarian God, I affirm that there is only one true God. I cannot plumb the depth of the mystery of his Deity, but only adore all that has been revealed in God: the Father who takes pity on me; who abased Himself for me in his Son; and who lives in me by his Holy Spirit: God for me, God with me, and God in me.” (In God’s School, p. 23)
This comes from the section of his book where he expounds upon the Apostle’s Creed in detail. It’s just one of the many gems I’ve found in this book which is based upon the Geneva Catechism and the Heidelberg Catechism. My professor did an excellent job translating it from the original French.