“God saw that a Sabbath was essential for man, even in Paradise. He needed to lay aside his own interests and pursuits for one day of the seven, that he might more fully contemplate the works of God and meditate upon His power and goodness. He needed a Sabbath to remind him more vividly of God and to awaken gratitude because all that he enjoyed and possessed came from the beneficent hand of the Creator.”
Patriarchs & Prophets p. 48

“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.”
Desire of Ages p.207