I hope you ascribe some degree of authority to the Bible. If not, it doesn’t matter much what the Bible says anyway and you’re wasting your time reading this.  But if you can believe the Bible, it says there's absolutely nothing you can do to earn the right to enter God's presence!

Your salvation results solely from your reliance on the Christ’s completed work on Calvary (God's grace in providing a substitute, Christ's death in your deserved place, and his resurrection and victory over death). Whatever good or bad deeds you do before your salvation doesn't count; whatever else you do after your salvation likewise don't have anything to do with your salvation. In other words, your salvation does not depend on you adhering to some religious rules or completing some unknown quantity of good deeds. Now that is good news!

After all, isn’t basing your eternal salvation on Thou Shalt’s and Thou Shalt Not’s really resting your salvation entirely on your own personal achievements? Wasn't that the very thing the Pharisees, and later the Judaizers, fell into.   The bitterest words Jesus ever uttered were directed against these sorry guys. Much of Apostle Paul’s writings in the New Testament were directed toward the heresies introduced by the Judaizers.

Yes, we should try to understand the doctrines correctly; yes, we want to obey the Commandments to the best of our ability.  But when we trust our salvation on what we do (or refrain from doing), or on what doctrines we understand correctly, aren’t we perilously close to resting that salvation on ourselves? Jesus, the Christ—not a doctrine, not a commandment, not some form of worship or some religious organization—is the Savior. He, alone, is the basis of our hope.

This is not an excuse to sin, this simply affirms what Paul wrote to the Ephesians

Ephesians 2:5-10…Even when we were dead in sins…hath [God] raised us up together, and made us sit together in heavenly places in Christ Jesus: That in the ages to come he might show the exceeding riches of his grace in his kindness toward us through Christ Jesus. For by grace are ye saved through faith; and that not of yourselves: it is a gift of God: Not of works, least any man should boast. For we are his workmanship, created in Christ Jesus unto good works, which God hath before ordained that we should walk in them.

As you might expect from a collection of books who’s purported goal is to explain the reconciliation of man to God, the Bible is replete with passages presenting God’s plan for this salvation.  Bible doctrine on any subject consists of the entire body of Scripture pertaining to that particular subject.

Various religious groups sometimes tend to redefine religious words to suite their particular doctrinal beliefs (just like the redefine who "Jesus" is).  But unless words have definite objective meanings to relay completed thoughts, and unless individuals can agree on these meanings, it would be impossible to communicate.  We’d go around in circles--perhaps even using the same words--but wouldn't successfully communicate thoughts.

Accept the words in their common meaning unless that meaning is inconsistent with other words in the sentence, with the overall context, or with other parts of the Scripture