How did Abel know what to do in order to offer a proper sacrifice to God? ​

The importance of revelation by the Spirit to a true believer can never be over emphasized. Revelation means more to you than perhaps you realize. Now I am not talking about this Book of Revelation and you. I am talking about ALL revelation. It is tremendously important to the church. Do you remember in Matthew 16 where Jesus asked the disciples this question,

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Whom do men say that I the Son of Man am?

And they said, Some say that Thou art John the Baptist: some, Elias; and others, Jeremias, or one of the prophets.

He saith unto them, But whom say ye that I am?

And Simon Peter answered and said, Thou art the Christ, the Son of the living God.

And Jesus answered and said unto him, Blessed art thou, Simon Barjona; for flesh and blood hath not revealed it unto thee, but My Father Which is in heaven.

And I say unto thee, that thou art Peter, and upon this rock I will build My church; and the gates of hell shall not prevail against it.

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The Roman Catholics say that the church is built upon Peter. Now that is really carnal. How could God build the church upon a man so unstable that he denied the Lord Jesus and cursed while doing it? God can't build His church upon any man born in sin. And it wasn't some rock lying there as though God had hallowed the ground at that spot. And it isn't as the Protestants say, that the church is built upon Jesus. It was the REVELATION. Read it the way it is written: “Flesh and blood hath not REVEALED it, BUT MY FATHER HATH REVEALED IT, and UPON THIS ROCK (REVELATION) I WILL BUILD MY CHURCH:” The church is built on Revelation, on the “Thus Saith the Lord”.

How did Abel know what to do in order to offer a proper sacrifice to God? By faith he received the revelation of the blood. Cain didn't get such a revelation (even though he had a commandment) so he couldn't offer the right sacrifice. It was a revelation from God that made the difference and gave Abel eternal life. Now you might take what the pastor says, or what the seminary teaches, and though it might be taught to you with eloquence, until God reveals to you that Jesus is the Christ, and that it is the blood that cleanses you, and that God is your Saviour, you will never have eternal life. It is the Spiritual revelation that does it.