None should feel at liberty to spend sanctified time in an unprofitable manner. It is displeasing to God for Sabbathkeepers to sleep during much of the Sabbath. They dishonor their Creator in so doing, and, by their example, say that the six days are too precious for them to spend in resting. They must make money, although it be by robbing themselves of needed sleep, which they make up by sleeping away holy time. They then excuse themselves by saying: “The Sabbath was given for a day of rest. I will not deprive myself of rest to attend meeting, for I need rest.” Such make a wrong use of the sanctified day. They should, upon that day especially, interest their families in its observance and assemble at the house of prayer with the few or with the many, as the case may be. They should devote their time and energies to spiritual exercises, that the divine influence resting upon the Sabbath may attend them through the week. Of all the days in the week, none are so favorable for devotional thoughts and feelings as the Sabbath. 1TT 291.4
All heaven was represented to me as beholding and watching upon the Sabbath those who acknowledge the claims of the fourth commandment and are observing the Sabbath. Angels were marking their interest in, and high regard for, this divine institution. Those who sanctified the Lord God in their hearts by a strictly devotional frame of mind, and who sought to improve the sacred hours in keeping the Sabbath to the best of their ability, and to honor God by calling the Sabbath a delight—these the angels were specially blessing with light and health, and special strength was given them. But, on the other hand, the angels were turning from those who failed to appreciate the sacredness of God's sanctified day, and were removing from them their light and their strength. I saw them overshadowed with a cloud, desponding, and frequently sad. They felt a lack of the Spirit of God. 1TT 292.1