Every human born has sinned against God and fallen short of His
standard (Romans 3:23).
We do not and cannot earn
salvation by keeping the Old Testament Law or by simply being a
good person. We will fail every time; it is in our nature to
sin. It is only through God sacrificing His Son Jesus in our
place, that we can acquire complete forgiveness. We can all
attain this by accepting Jesus as our Savior, and accepting that
He shed His blood to atone for the sins of all who repent. The
act of communion does not save us, but we honor this wonderful
gift from God with communion as a way to remember His sacrifice.