He that glorieth, let him glory in the Lord. If there was anything which we as sinners could do that would contribute anything toward our salvation, then we could claim a part of the glory of our salvation for ourselves. God will not permit that. He will have all the glory. He will not share His glory with another.
Salvation is by grace alone, without works.
Salvation is the work of God alone. We are His workmanship. Let all the proud, foolish thoughts of self-salvation by the works of the flesh be forever put out of your heart and mind. Not unto us, O Lord, not unto us, but unto Thy name give glory, for thy mercy, and for Thy truth's sake. We are His workmanship, created in Christ Jesus unto good works, which God hath before ordained that we should walk in them.