Remember the Sabbath Day.

Sabbath Hours Not Ours but God's—God has given us the whole of six days in which to do our work, and has reserved only one to Himself. This should be a day of blessing to us—a day when we should lay aside all our secular matters and center our thoughts upon God and heaven.8Manuscript 3, 1879. CG 529.2

When the Sabbath commences, we should place a guard upon ourselves, upon our acts and our words, lest we rob God by appropriating to our own use that time which is strictly the Lord's. We should not do ourselves, nor suffer our children to do, any manner of our own work for a livelihood or anything which could have been done on the six working days. Friday is the day of preparation. Time can then be devoted to making the necessary preparation for the Sabbath and to thinking and conversing about it. Nothing which will in the sight of Heaven be regarded as a violation of the holy Sabbath should be left unsaid or undone, to be said or done upon the Sabbath. God requires not only that we refrain from physical labor upon the Sabbath, but that the mind be disciplined to dwell upon sacred themes. The Fourth Commandment is virtually transgressed by conversing upon worldly things or by engaging in light and trifling conversation. Talking upon anything or everything which may come into the mind is speaking our own words. Every deviation from right brings us into bondage and condemnation.9Testimonies For The Church 2:702, 703. CG 529.3