Rom 4:4-5
4 If you're a hard worker and do a good job, you deserve your pay; we don't call your wages a gift. 5 But if you see that the job is too big for you, that it's something only God can do, and you trust him to do it — you could never do it for yourself no matter how hard and long you worked — well, that trusting-him-to-do-it is what gets you set right with God, by God. Sheer gift.

You have to earn many things on this Earth and you’re rewarded for earning them but God gives gifts, that you don’t earn them, He just gives them!