D&C 59 - 61

From the earliest of days, the Lord gave commandments of sacrifice. Sacrifices to remind man of the greatest sacrifice of all - that by the Savior in providing an infinite atonement. Though we are far from possessing the capacity to sacrifice as the Savior, he still requires us to sacrifice as much of our capacity as required. To the saints in Zion he commanded -

"Thou shalt offer a sacrifice unto the Lord thy God in righteousness, even that of a broken heart and a contrite spirit." (Doctrine and Covenants Section 59:8) This is our modern-day sacrament, oblation, or our obligation of sacrifice. We are commanded to -

"...go to the house of prayer and offer up thy sacraments upon my holy day;" (Doctrine and Covenants Section 59:9) and "remember that on this, the Lord's day, thou shalt offer thine oblations and thy sacraments unto the Most High, confessing thy sins unto thy brethren, and before the Lord." (Doctrine and Covenants Section 59:12)

There are many saints that religiously do this in great reverence. They come early to sacrament meeting, they listen to the prelude music, and they come with a broken heart and contrite spirit confessing there sins before the Lord. What great irreverence, disrespect, uncourteousness, and rudeness it is as some members opt to come to sacrament meetings late disrupting the sacred sacrament and oblations of God fearing saints.