God doesn’t measure nor does He rate sin based on frequency nor severity. In other words, in God’s empirical righteousness, if you sin in your heart 1X you are as guilty as serial killer. According to St. Augustine of Hippo sin is “a word, deed, or desire [thought] in opposition to the eternal law of God.” So what is God’s eternal law? In prefacing the ‘Shema Prayer’ found in Deut 6:4, Jesus said in Mark 12:29-30, “Hear O Israel, You must love the LORD your God with all your heart, all your soul, all your strength, and all your mind.’ And, ‘Love your neighbor as yourself.” Jesus had to continually remind the Pharisees of their inability to keep the Law of God. He was trying to get them back then as well as us today, to see our spiritual bankruptcy and our need for a Savior. Without the cleansing of sin that He provides, and the empowering presence of the Holy Spirit who lives in the hearts of the redeemed, authentically loving God to any degree is impossible.
So, you can live what you ‘consider’ a flawless life but if you fail to love God and your neighbor as referenced above you will have broken every command you so painstakingly work to keep!