We may well admire self-reliance in some aspects of life and “self-made” people who have achieved great accomplishments through self-effort. People such as entrepreneurs, athletes, artists, scientists and others.
But when it comes to our salvation and getting right with God, there is absolutely no opportunity to boast or congratulate ourselves. We can do nothing to save ourselves. The only thing we “bring to the table” is our sin, the very reason we need salvation.
Our salvation is made possible by the grace of God. It is received from God by faith alone in Christ alone.