I don't think any one is claiming that they have arrived, but rather that by God's grace and the work of the Holy Spirit we may grow more and more into the person God designed us to be
And yes,the ten commandments is the law of righteousness -- to think differently is to miss the deeper, fuller meaning in God's law.
Under the general heading of selfishness comes every other sin.
God's commandments show a life of unselfness.
The first commandment states -- worship the Lord Thy God and Him only serve! Selfishness, on the other hand worships self.. Here is the whole foundation of all the rest.
Selfishness will always look at others as being a means or objects to use in some way to profit self. All the relationships of a selfish person, with everyone, be it in worship or in interacting with others will all be motivated by what is best, most comfortable, most pleasurable, most advantageous for SELF.
A person who makes God first, last and everything, puts self on the lower seat. They start to see others through the eyes of Christ, Who gave up heavenly glory and suffered terrible because He put fallen, rebellious mankind above His own comfort and pleasure, and gave His life to save them.
Your accumulated benevolent deeds will NOT save you any more than rigorous Sabbath keeping will save anyone. Both can be done from a purely selfish heart for self acclaim or reward or show
OR
they are the fruit of a life dedicated to God, trusting in Him and surrendering our selfish hearts and minds to Him to melt those selfish hearts and minds and fill us with love to God supreme and others as themselves.
1st commandment -- Place God on the throne of your life, worship Him, take self off the throne.
2nd commandment -- No idols. Self wants to put things, or people, or ambition ahead of God, but these end up also being self worship and block God from working in our lives.
3rd commandment -- Do you love Christ with all your heart? Taking His name (Christian) shows you are on His side. Living a life foreign to the ways of Christ, while taking His mane, is honoring self, and a reproach on Christ. Taking His name in vain.
4th commandment -- Love God -- you will spend the day as special time with Him.
5th commandment -- Love and honor your parents, and by extension the elderly. Do good for them, care for them, etc.
6th commandment -- Love others -- you will not harbor hate, bitterness, resentfulness against others, but have a forgiving spirit. Helping, not "killing.
7th commandment -- Love your spouse, be faithful, true, honest, loving. And yes, that requires forgiveness, understanding, and NOT seeking ones own pleasure outside the relationship. Marriage can be a powerful school to grow in unselfishness.
8th commandment -- Love others-- give to others, don't take their things away, respect their personal property and dignity. Stealing is selfishness. A person will not steal from someone they love, but give them whatever they can to meet their needs.
9th commandment -- love others -- speak truth in love, respect their reputation, speak words of encouragement, do not gossip or bear false reports of others.
10th commandment -- Love others -- this commandment is a foundational one against selfishness. -- coveting, envy, jealousy are all fruits of selfishness -- be happy for the success of others, rejoice with them, don't envy them, don't resent their good fortune, be content with your own lot, not selfishly wanting what others have.
If everyone, through the grace of God and the power of the Holy Spirit, lived by this law -- the world would be overflowing with love and happiness.