If you have never sinned in a manner that counts on God's sin list, it does not mean that you are perfect in every respect. It means only that you understand the basic principles of righteous living. You understand the elemental truths, and you know the sins that lead to death. You are on your way to a victorious life. There are other things that God considers unrighteous that you may or may not have engaged in.
If you treat others as you would want them to treat you, spiritually and physically, if you take every thought captive and make it obedient to the Scriptures, and if you exhibit only the ether of love in every cell of your being, you will have attained true righteousness. The Lord God Almighty is El Shaddai. He is true, and he is faithful.