Alatide, I quoted some scriptures already to prove that.
Here's some more for you.
http://www.impactoeconomico.com/Documents/Bible_Studies/Sin_degrees_of_sin_part_5.htm#1-ARE THERE DEGREES OF SIN?
Rank these four sins:
* THE ADULTERER AND THE ADULTERESS SHALL SURELY BE
PUT TO DEATH-Lev 20:10.
* IF A MAN...or A WOMAN...LIE WITH A BEAST...they SHALL SURELY BE
PUT TO DEATH-Lev 20:15,16,15.
* IF A MAN ALSO LIE WITH MANKIND, AS HE LIETH WITH A WOMAN, BOTH OF THEM...SHALL SURELY BE
PUT TO DEATH-Lev 20:13.
* BUT I SAY UNTO YOU, THAT WHOSOEVER IS ANGRY WITH HIS BROTHER WITHOUT A CAUSE SHALL BE IN DANGER OF THE JUDGMENT: AND WHOSOEVER SHALL SAY TO HIS BROTHER, RACA, SHALL BE IN DANGER OF THE COUNCIL: BUT WHOSOEVER SHALL SAY, THOU FOOL, SHALL BE IN
DANGER OF HELL FIRE-Mt 5:22.
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* IT IS REPORTED COMMONLY THAT THERE IS FORNICATION AMONG YOU, AND SUCH FORNICATION AS IS NOT SO MUCH AS NAMED AMONG THE GENTILES, THAT ONE SHOULD HAVE HIS FATHER’S WIFE-1 Cor 5:1.
How is this statement supported by the preceding scripture?
Sexual sins, such as fornication, adultery, lying with a beast, and homosexuality, are among the worst of sins.
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* WOE UNTO YOU, SCRIBES AND PHARISEES, HYPOCRITES! FOR YE PAY TITHE OF MINT AND ANISE AND CUMMIN, AND HAVE OMITTED THE WEIGHTIER MATTERS OF THE LAW, JUDGMENT, MERCY, AND FAITH: THESE OUGHT YE TO HAVE DONE, AND NOT TO LEAVE THE OTHER UNDONE-Mt 23:23.
I tend to agree that the sin of self-righteousness and hypocrisy are among the most serious because of the way Jesus treated the Pharisees. In reality, though, this is not an ordinary sin. It's actually a rejection of Jesus as the Messiah who taketh away the sins of the world. Sinners without Christ are damned because they don't accept Him, repent, and change their ways. They are like the younger brother in the parable of the Prodigal Son until he came to his senses and returned home. The Pharisees were damned for not accepting Him but primarily because they put their faith in their own good works. They loved to point out minor breaches of the law but failed to understand their own sinfulness. They were like the older brother in the parable of the Prodigal Son.
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I also agree that adding or taking away from the Bible is a serious offense.
* FOR I TESTIFY UNTO EVERY MAN THAT HEARETH THE WORDS OF THE PROPHECY OF THIS BOOK, IF ANY MAN SHALL ADD UNTO THESE THINGS, GOD SHALL ADD UNTO HIM THE PLAGUES THAT ARE WRITTEN IN THIS BOOK: AND IF ANY MAN SHALL TAKE AWAY FROM THE WORDS OF THE BOOK OF THIS PROPHECY, GOD SHALL TAKE AWAY HIS PART OUT OF THE BOOK OF LIFE, AND OUT OF THE HOLY CITY, AND FROM THE THINGS WHICH ARE WRITTEN IN THIS BOOK-Rev 22:18,19.
It's basically like preaching a false gospel. But the punishment,
GOD SHALL TAKE AWAY HIS PART OUT OF THE BOOK OF LIFE, is no worse than the one stated for
WHOSOEVER SHALL SAY, THOU FOOL, SHALL BE IN
DANGER OF HELL FIRE-Mt 5:22.
My belief is that teachers and preachers will be held to a higher level of accountability but I don't know exactly what that means.
In general, I believe that all sin is an abomination to God and even one of those which we regard as minor would be sufficient to damn us to Hell for all of eternity if we do not repent and accept Jesus as our Lord and Savior as well as undergo a truly born again experience which is life changing. We will continue to sin but will be more aware of when we do so and repent.