How early was this sacrificial system known?

Answer

"By faith Abel offered unto God a more excellent sacrifice than Cain, by which he obtained witness that he
was righteous, God testifying of his gifts." Heb. 11: 4. See Gen. 4: 3-5; 8: 20.

3. By what comparison is it indicated that some portions of God's Word are more difficult to understand than others?
How may we know that we are the sons of God?
What was the result of this strife?
4. What explanation did Moses give the rulers of Israel concerning the withholding of the manna on the seventh day in the wilderness of Sin, before they reached Sinai?
How did Christ's death affect the ceremonial law?
What is the object of the International Reform Bureau?
Who is responsible for the present state Sunday laws of the United States?

Questions & Answers are from the book Bible Readings for the Home Circle