Verses proving salvation to anyone that believes and not of works

It's a sin to take the Lord's Supper if you aren't saved. I don't see why you're posting that.

The publican recognized his bad works and asked for mercy. Asking for mercy is a work, is it not? It's certainly not faith. Of course, you need to have faith to ask for mercy, but the asking for mercy is a good work.

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And what is the Lord's Supper? St. Paul seems to be referring to a present event, something that the Corinthians were actively doing, and were condemning themselves to death in doing falsely.

So is all someone has to do to be saved is believe and ask God to forgive them?

Nope. The publican went home justified, not saved.

No, because they're lacking in works, is what the passage goes on to say, not because they trusted in works. Although trusting in works will negate authentic faith.

That's the same thing

They were literally saying how Jesus should let them in because they did many wonderful works

wrong