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.

Is mere assent to divine truth sufficient?
What does Christ declare Himself to be?
How did Christ show His tender regard for children?
What was done with the blood of the goat upon which the Lord's lot fell?
When Paul wished to preach the true God to the idolatrous Athenians, how did he describe Him?
What striking figure is used to describe the destruction wrought under the second trumpet?
What did the Sadducces in Christ's time deny?

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