3) Preservation from mortal sin
While we should refrain from receiving the Eucharist when we are aware of being in a state of mortal sin, we should receive the Eucharist as much as possible when we are able because it preserves us from grave sin. It is as if the Eucharist’s power washes away the venial sin in our souls and then covers us with a protective coat which helps us to stay away from serious sin.