The greatness of God's covenant faithfulness is spoken of as if it were an object that reached as high as the heavens. The abstract noun "faithfulness" can be translated as an adjective. Alternate translation: "Your covenant faithfulness ... is very great" or "You ... are as faithful to your covenant as the heavens are high above the earth" (See: [[rc://en/ta/man/jit/figs-metaphor]] and [[rc://en/ta/man/jit/figs-abstractnouns]])
The greatness of God's loyalty is spoken of as if it was very high. Alternate translation: "is as high as the clouds" or "is enormously great" (See: [[rc://en/ta/man/jit/figs-metaphor]])