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.

In contrast with the pride and self-exaltation exhibited by Satan, what spirit did Christ manifest?
How fully are we thus united with Christ in His experience of death and resurrection?
How was the prophecy given?
How long will the saints engage in this work of judgment?
Under what threatened penalty is the worship of the image of the beast enforced?
What did the prophet see coming up at this time?
What will the waiting ones say when Jesus comes?

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