I’ll correct you on that because you are not quite right. I monitor my ethics and behavior 24-7. I don’t think anyone is saying that the Eucharist is the *only* way to gain grace...it’s just that taking God into your body is....well...it sorta trumps other ways.
my understanding is that the sacraments, in and of themselves, do not bestow grace at all. God, and God alone, saves people and shows mercy to the sinners.
The sacraments are powerful tools that help a person stay on the right path and strengthen the Spirit. They are a way to bring the faithful closer to God.
The sacraments are a part of one’s journey, and a valuable tool, but they cannot bestow grace upon the wicked, no matter how many times one goes to communion,. In fact, to participate in Holy Communion, one must make sure that they go through confession, contrition and penance first to cleanse themself of sin.