"Thou shalt offer a sacrifice unto the Lord thy God in righteousness, even that of a broken heart and a contrite spirit. And that thou mayest more fully keep thyself unspotted from the world, thou shalt go to the house of prayer and offer up thy sacraments upon my holy day; _for verily this is a day appointed unto you_ to rest from your labors and to pay thy devotions unto the Most High. Nevertheless thy vows shall be offered up in righteousness on all days and at all times; but 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 unto the Lord._ And on this day thou shalt do none other thing only let thy food be prepared with singleness of heart that thy fasting may be perfect, or in other words that thy joy may be full" (Doc. & Cov. xlix:8-13). This is in clear allusion to the first day of the week; and thus the matter is set at rest. The observance of the "Lord's day" as the day sacred to the worship of Almighty God, so far as the Latter-day Saints are concerned, does not rest upon the "probability" that it was of divine or apostolic institution, as is the case with Protestant Christendom; nor does it rest upon the "tradition" of the church that it was of apostolic institution, as is the case with the Catholic church; but the observance of that day comes to the Church of Christ by direct appointment of the Lord by revelation to the head of the church in this dispensation; and that revelation transforms the "probability," that the first day of the week was substituted for the old Jewish Sabbath, into a certainty. In conclusion, let us ask our young Latter-day Saints to observe with what solemnity God hath dedicated this day, and set it apart for the worship of the Lord; and how strictly he hath prohibited other occupation than this on that day; and so much as our "certainty" outstrips the "probability" of other Christians that the "Lord's day" is the proper day for public worship, so let our strict observance of it outstrip theirs.[A] [Footnote A: At the Seventy-seventh Annual Conference of the Church of Jesus Christ of Latter-day Saints, held in the Tabernacle, Salt Lake City, Utah, April 5, 6, 7, 1907, Anthon H. Lund of the First Presidency of the Church, speaking on this subject of the Sabbath Day and justifying the practice of the Church in observing the first day of the week as our Christian Sabbath, employed among other arguments the following: