Paul contrasts the fading glory of the old covenant with the superiority and freedom of the new covenant. He contrasts the veil of Moses with the clarity of present revelation. The time of Moses was a less clear picture of what is now revealed.
"the ministry of death." This refers to the Old Testament law that God gave through Moses. Alternate translation: "the ministry that causes death because it is based on the law" (See: [[rc://en/ta/man/translate/figs-explicit]])
"carved into stone with letters." This can be stated in active form. Alternate translation: "that God carved into stone with letters" (See: [[rc://en/ta/man/translate/figs-activepassive]])