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.

What does the imputed righteousness of Christ enable God to do, and still be just?
What was this earthly sanctuary and its round of service?
By what means did the Jews know God's will?
Of what did Christ say the Son of man is Lord?
What were these martyrs represented as doing?
How will this great event affect the world?
10. As we near the closing scenes of human probation, why may we expect an increase in demoniacal manifestations?

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