How should one receive Holy Communion?
One should approach the altar rail, filling in wherever there is an open place to kneel without concern of staying in order and kneel at the rail. If one is unable to kneel, they may remain standing. As the priest approaches, he will say the following prayer in Latin, "May the body of Our Lord Jesus Christ preserve your soul into life everlasting. Amen." He will also be making the sign of the cross over you, giving you a little benediction with the Sacred Host. As he comes closer, open your mouth wide and extend your tongue in order to give the priest plenty of room to place the Sacred Host. Do not wait for him to already be extending his hand toward you or for him to complete the prayer before opening your mouth. There is no need to say, "Amen," "Thank you" or any other response at this time because the priest says the whole prayer himself. It is not proper to receive with one's teeth. Avoid closing your mouth on the priest's fingers (for one should never bite the hand that feeds you and he will need his fingers again for the next time he reads Mass).