Salvation is by Jesus Christ and by Him alone. No amount of good works, good deeds, good moral living, giving in offerings, church going, religious activity, etc. Will bring salvation apart from Jesus Christ. A Christian will do all those things and more but there must be a foundation laid and that is Jesus Christ and Him Crucified. This is the offense of the gospel.
Many today base their eternal destiny in doing good works.
They live by a code of their church, their company, their own thinking, and some book they have read. That will not get any one to heaven. No one can come to The Father apart from Him. All of the cults of this world believe in some god. Some will even give their life for this god.