But what it boils down to is simply this:
His Grace is sufficent.
2 Nephi 25:23 says, "For we labor diligently to write, to persuade our children, and also our brethren, to believe in Christ, and to be reconciled to God; for we know that it is by grace that we are saved, after all we can do."
You can not work your way into Heaven, friends. You can't. So, trust in the Lord, repent, and let His Grace be the key to your whole life. Jesus makes all the difference.