“God gave to men the memorial of His creative power, that they might discern Him in the works of His hand. The Sabbath bids us behold in His created works the glory of the Creator. … On the holy rest day, above all other days, we should study the messages that God has written for us in nature. … As we come close to the heart of nature, Christ makes His presence real to us, and speaks to our hearts of His peace and love.” — Ellen G.
“One of the important reasons why the Lord delivered Israel from slavery to Egypt was that they might keep His holy Sabbath. … Evidently Moses and Aaron renewed the teaching about the holiness of the Sabbath, because Pharaoh complained to them, ‘Ye make [the people] rest from their burdens.’ Exodus 5:5. This would indicate that Moses and Aaron began a Sabbath reform in Egypt.
The observance of the Sabbath was not to be a commemoration of their slavery in Egypt, however. Its observance in remembrance of creation was to include a joyful remembrance of deliverance from religious oppression in Egypt that made Sabbath observance difficult. In the same way, their deliverance from slavery was forever to kindle in their hearts a tender regard for the poor and oppressed, the fatherless and widows.” — Appendix note in Ellen G. White, From Eternity Past, p. 549.