Aquinas on the Meriting of our Salvation
"Now it is clear that between God and man there is the greatest inequality; for they are infinitely apart, and all man's good comes from God... hence man's merit with God only exists on the presupposition of the Divine ordination, so that man obtains from God, as a reward of his operation, what God gave him the power of operating for... God seeks from our goods not profit, but glory, i.e., the manifestation of His goodness; even as He seeks it also in His own works. Now nothing accrues to Him, but only to ourselves, by our worship of Him. Hence we merit from God." Summa Theologiae I-II. 114.1, corpus and ad 2.
...Do you see how there is nothing of "earning" our salvation here?