The Four Ends of the Mass:
1. Adoration - through the Mass, we give God solemn worship, praise and honour.
2. Thanksgiving - through the Mass, we thank God for all He has bestowed.
3. Propitiation - through the Mass (the re-presentation of the Sacrifice of Christ upon Calvary), God's justice for the sins of mankind is satisfied.
4. Petition - through the Mass, we present God with our needs and ask for graces.