In his book, “With Us Today: On the Real Presence of Jesus Christ in the Eucharist,” Fr. Hardon gives us 9 effects of Holy Communion produced in one who receives in a state of grace:

1. Sustenance of Supernatural Life
2. Promise of Bodily Resurrection from the Dead
3. Remission of Venial Sins
4. Protection Against Future Sins
5. Curbs the Urges of Concupiscence
6. Spiritual Joy
7. Perseverance in Grace
8. Growth in Supernatural Life
9. Remission of Sin

Now, can anyone truly say that they get nothing out of Mass?  And also, reasons why you want to make sure you are in a state of grace if you are to receive the Body and Blood of Christ.