[Old Yeller]

For it is by grace you have been saved, through faith—and this is not from yourselves, it is the gift of God— not by works, so that no one can boast.

God is not going to share his glory, by allowing people to think they can do any kind of works to help save themselves. If you can't trust that Jesus's sacrifice on the cross was sufficient, then you will be judged by the law, which no one can "pass".

[Old Yeller]

For it is by grace you have been saved, through faith—and this is not from yourselves, it is the gift of God— not by works, so that no one can boast.

Ephesians 2:8-9