Paul only wants to preach to people who have never heard of Christ. Alternate translation: "And so, my desire has been to preach the good news in places where people have never heard of Christ" (See: [[rc://en/ta/man/jit/figs-explicit]])
Paul speaks of his ministry work as if he were building a house on a foundation. Alternate translation: "in order that I might not be simply continuing the work that someone else already started. I do not want to be like a man who builds a house on someone else's foundation" (See: [[rc://en/ta/man/jit/figs-metaphor]])