Sleep: Nothing that pertains to physical perfection should be looked upon as of little importance. In eating, drinking, and dressing, the laws of health should be diligently followed, and in regulating the hours for sleep, there should be no haphazard work… the lights should be extinguished at half past nine. {CE 124.1}
Digestive Rest: The stomach, when we lie down to rest, should have its work all done, that it may enjoy rest, as well as other portions of the body. The work of digestion should not be carried on through any period of the sleeping-hours… The remedy such require is to eat less frequently and less liberally, and be satisfied with plain, simple food, eating twice, or, at most, three times, a day. The stomach must have its regular periods for labor and rest; … With regular habits and proper food the stomach will gradually recover. {Review & Herald, June 13, 1899 par. 7}
In many cases the faintness that leads to a desire for food is felt because the digestive organs have been too severely taxed during the day. After disposing of one meal, the digestive organs need rest. At least five or six hours should intervene between the meals, and most persons who give the plan a trial will find that two meals a day are better than three. {Ministry of Healing 304.1}
Rest: Jesus knew that his disciples after their busy labors would derive great benefit by engaging in private communion with him and with their brethren. He knew that a season of rest and recreation, apart from the multitude and the scene of their labors, would invigorate them, and he sought to withdraw them from busy cities to a quiet resort where they might have a season of precious fellowship with him and with each other… {Review & Herald, November 7, 1893 par. 6}
The Sabbath: The demands upon God are even greater upon the Sabbath than upon other days. His people then leave their usual employment, and spend the time in meditation and worship. They ask more favors of Him on the Sabbath than upon other days. They demand His special attention. They crave His choicest blessings. God does not wait for the Sabbath to pass before He grants these requests. Heaven's work never ceases, and men should never rest from doing good. The Sabbath is not intended to be a period of useless inactivity. The law forbids secular labor on the rest day of the Lord; the toil that gains a livelihood must cease; no labor for worldly pleasure or profit is lawful upon that day; but as God ceased His labor of creating, and rested upon the Sabbath and blessed it, so man is to leave the occupations of his daily life, and devote those sacred hours to healthful rest, to worship, and to holy deeds. The work of Christ in healing the sick was in perfect accord with the law. It honored the Sabbath. {Desire of Ages 207.2}
Matthew 11:29-30 Take my yoke upon you, and learn of me; for I am meek and lowly in heart: and ye shall find rest unto your souls.
For my yoke [is] easy, and my burden is light.