This image...though quite shocking... illustrates what the Holy Eucharist is: the sacrifice of Christ. If we remembered this every time we receive Communion, how different it would be! Keep in mind we are NOT re-crucifying Christ because His sacrifice is eternal! This is intense.
Through the Holy Sacrifice, Our Lord Jesus Christ supplies for many of your negligences and omissions. He forgives you all the venial sins which you are determined to avoid. He forgives you all your unknown sins which you never confessed. The power of Satan over you is diminished. By piously hearing Holy Mass you afford the Souls in Purgatory the greatest possible relief.