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.

After one truly receives Christ, whose life will be manifested in him?
How fully did Israel once acknowledge their wrong doing ?
What motive will inspire all true parents to faithfulness in teaching their children?
What was offered in this sanctuary?
11. What sign did Christ mention by which His disciples might know when the destruction of Jerusalem was near?
In what language is the same truth again expressed?
When asked if He was a king, what did Christ say?

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