Dear shepherdsword,
The "sin' that Christ mentions in the two verses that you quoted is the sin of mixing of works with faith. Christ is not referring to ALL sins in those two verses.
When a babe in Christ mixes their own works with faith, they are committing the one and only sin that leads to death.
This verse applies:
Prov 23:26 My son, give me thine heart, and let thine eyes observe my ways. 27 For a whore is a deep ditch; and a strange woman is a narrow pit. 28 She also lieth in wait as for a prey, and increases the transgressors among men. 29 Who hath woe? who hath sorrow? who hath contentions? who hath babbling? who hath wounds without cause? who hath redness of eyes? 30 They that tarry long at the wine; they that go to seek mixed wine. 31 Look not thou upon the wine when it is red (Old Wine), when it giveth his color in the cup, when it moves itself (man’s works) aright. 32 At the last it bites like a serpent, and stings like an adder.
In the wine analogy used by Christ in His spiritual teachings, the Old Wine (red) represents the Old Covenant and the New Wine represents the New Covenant.
The Old Covenant is based solely upon the works of man to make a person acceptable to God. In contrast, the New Covenant is based solely upon the works of Christ (both His physical and spiritual works) by which He will make a person acceptable to God.
When a babe begins mixing in their own works with the works of Christ, they are saying that the works of Christ are not sufficient to save them. When a babe accepts this lie, they are following the crooked way of Satan rather than the straight way of Christ. This is the “sin that leads to death” (1John 5:16) and is when a babe falls away and is broken, snared & taken by Satan.
Isa 28:9 Whom shall he teach knowledge? and whom shall he make to understand doctrine? Them that are weaned from the milk, and drawn from the breasts (converted believers). 10 For precept must be upon precept, precept upon precept; line upon line, line upon line; here a little, and there a little: 11 For with stammering lips and another language (spiritual language) will he speak to this people. 12 But the word of the LORD was unto them (babes who draw milk) precept upon precept, precept upon precept; line upon line, line upon line; here a little, and there a little; that they might go, and fall backward, and be broken, and snared, and taken (by Satan).
Paul said that when a believer commits the sin that leads to death, they cannot be renewed to repentance because they sacrifice the Son of God afresh. But there is a solution presented by God’s Word (here a little and there a little) which can restore an apostate believer. That "way" is for Christ to come to them a second time and pour out the Latter Rain of the Spirit. The baptism of the Spirit will come in strength and will heal the person's spiritual blindness. As a result, the apostate believer will repent of their works and will come out of Satan’s deceptions. The judgment of the Day of the Lord will then immediately follow to remove and destroy all the spiritual things (chaff, Mat 3:12) within them that have made them a sinful child of the Devil. It is from this judgment that the child of the Devil perishes by the Sword.
Have you ever wondered why there is little unity of truth taught by the many different denominational churches in the world? It is because the churches of this world are fully apostate and have become places where the blind lead the blind. However, they do have one common belief. They all believe that a person must contribute at least some “works” to receive their free gift of salvation from Christ. Some apostate churches require many works, while some require just one or two. However, the number of works is unimportant since it only takes one work to commit the sin that leads to death and fall from grace.
When a person understands the true message being taught by the healing of the infirmed man (John 5:1-15) and the forgiveness of the woman taken in adultery (John 8:1-11), it becomes much easier to understand that Christ is only referring to the sin that leads to death. I can explain those two teachings but it would take a couple of additional posts to do it. If you have an interest, just let me know.
Joe