Ephesians 2:8-9 For by grace you have been saved through faith, and that not of yourselfs. It is the gift of God, not as a result of works, that no one should boast.
Imagine a world where God created a point system by which we each had to earn "goodness". One point for saying nice things, lose two points for being mean. We would constantly be striving and those who got more points than others would likely flaunt it, or as the author of Ephesians says, "boast".
When we receive a gift, we don't try to take credit for that gift. If someone complements us, we say, "Thanks! So and so gave this to me.".
Thank God that He set things up so that we couldn't earn his favor or his grace or even that we could muster up faith without it being a gift from him (1 Cor 12:9).
Thank you Lord for setting things up in such a way that we can only attribute our redemption to you and that we can truly find rest because we can't earn that amazing gift of grace.