How we worship, praise, and give thanks to our Triune God at Mass as members of His Community of believers, is reflective of the depth, or shallowness, of our individual Catholic Christian Faith.
Consequently, we remember that the church is a sacred place:
Mass is holy. It is that most special and sacred of times that we encounter our Creator-Redeemer-Sustainer GOD in a most intimate and awesome way and receive Him in the most real way possible, in The Eucharist - if we are properly disposed.
Dress Appropriately. One should always wear clothes that are modest, and, if at all possible, all things being equal, clean and the nicest clothes one has. Shorts, sweats, halter tops, low cut blouses, tee shirts, and the like are a distraction and diminish the reverential aspect of the Mass.
Be on time. It can be distracting when people arrive late to Mass. One should do everything in one’s power to arrive on time – better yet, early, so as to avoid disturbing one’s fellow worshippers and their focus on the Mass.
Turn off electronic devices. These can also be distracting.
Show reverence toward the tabernacle and the altar before entering the pew.
Genuflection is preferred, but a profound bow will suffice if one is physically incapable of genuflecting. The purpose of this is show respect and reverence for our King and to acknowledge His Real Presence in the tabernacle.
Kneel or sit quietly before Mass. We do this so that we can pray, meditate, and properly prepare ourselves for the beauty and splendor of the Mass, and to be considerate of those around us, who are also in contemplation of this awesome Reality.
Participate fully. We do this by immersing ourselves totally in the Mass by diligently listening to God’s Word, participating in the prayers, and being properly disposed to receive The King of the Universe Himself in The Eucharist.
Examine your conscience. Join in communion if you are a practicing Catholic in a state of grace. Otherwise, join us in spiritual communion.
Stay until the end. Mass is not concluded until the final prayer and dismissal, and it is the polite thing to do to remain in the pew until the end of the recessional song, since it is, after all, a sung prayer.
Reverently leave the church. Again these actions by the congregation demonstrate due respect for our Lord in The Blessed Sacrament. There is plenty of time to share camaraderie and conviviality once we have left the worship space of the Church, and, furthermore, we avoid the possibility of disturbing those who wish to remain behind in the church for contemplation and prayer.