At this time the rite of circumcision was given to Abraham as “a seal of the righteousness of the faith which he had yet being uncircumcised.” Romans 4:11. It was to be observed by the patriarch and his descendants as a token that they were devoted to the service of God and thus separated from idolaters, and that God accepted them as His peculiar treasure. By this rite they were pledged to fulfill, on their part, the conditions of the covenant made with Abraham. They were not to contract marriages with the heathen; for by so doing they would lose their reverence for God and His holy law; they would be tempted to engage in the sinful practices of other nations, and would be seduced into idolatry. (PP 138.1) MC VC

God conferred great honor upon Abraham. Angels of heaven walked and talked with him as friend with friend. When judgments were about to be visited upon Sodom, the fact was not hidden from him, and he became an intercessor with God for sinners. His interview with the angels presents also a beautiful example of hospitality. (PP 138.2) MC VC

In the hot summer noontide the patriarch was sitting in his tent door, looking out over the quiet landscape, when he saw in the distance three travelers approaching. Before reaching his tent, the strangers halted, as if consulting as to their course. Without waiting for them to solicit favors, Abraham rose quickly, and as they were apparently turning in another direction, he hastened after them, and with the utmost courtesy urged them to honor him by tarrying for refreshment. With his own hands he brought water that they might wash the dust of travel from their feet. He himself selected their food, and while they were at rest under the cooling shade, an entertainment was made ready, and he stood respectfully beside them while they partook of his hospitality. This act of courtesy God regarded of sufficient importance to record in His word; and a thousand years later it was referred to by an inspired apostle: “Be not forgetful to entertain strangers: for thereby some have entertained angels unawares.” Hebrews 13:2. (PP 138.3) MC VC

Abraham had seen in his guests only three tired wayfarers, little thinking that among them was One whom he might worship without sin. But the true character of the heavenly messengers was now revealed. Though they were on their way as ministers of wrath, yet to Abraham, the man of faith, they spoke first of blessings. Though God is strict to mark iniquity and to punish transgression, He takes no delight in vengeance. The work of destruction is a “strange work” to Him who is infinite in love. (PP 138.4) MC VC

He did not even then trust His precepts to the memory of a people who were prone to forget His requirements, but wrote them upon tables of stone. He would remove from Israel all possibility of mingling heathen traditions with His holy precepts, or of confounding His requirements with human ordinances or customs. But He did not stop with giving them the precepts of the Decalogue. The people had shown themselves so easily led astray that He would leave no door of temptation unguarded. Moses was commanded to write, as God should bid him, judgments and laws giving minute instruction as to what was required. These directions relating to the duty of the people to God, to one another, and to the stranger were only the principles of the Ten Commandments amplified and given in a specific manner, that none need err. They were designed to guard the sacredness of the ten precepts engraved on the tables of stone. (PP 364.1) MC VC

If man had kept the law of God, as given to Adam after his fall, preserved by Noah, and observed by Abraham, there would have been no necessity for the ordinance of circumcision. And if the descendants of Abraham had kept the covenant, of which circumcision was a sign, they would never have been seduced into idolatry, nor would it have been necessary for them to suffer a life of bondage in Egypt; they would have kept God’s law in mind, and there would have been no necessity for it to be proclaimed from Sinai or engraved upon the tables of stone. And had the people practiced the principles of the Ten Commandments, there would have been no need of the additional directions given to Moses. (PP 364.2) MC VC

The sacrificial system, committed to Adam, was also perverted by his descendants. Superstition, idolatry, cruelty, and licentiousness corrupted the simple and significant service that God had appointed. Through long intercourse with idolaters the people of Israel had mingled many heathen customs with their worship; therefore the Lord gave them at Sinai definite instruction concerning the sacrificial service. After the completion of the tabernacle He communicated with Moses from the cloud of glory above the mercy seat, and gave him full directions concerning the system of offerings and the forms of worship to be maintained in the sanctuary. The ceremonial law was thus given to Moses, and by him written in a book. But the law of Ten Commandments spoken from Sinai had been written by God Himself on the tables of stone, and was sacredly preserved in the ark. (PP 364.3) MC VC