You sin and you know it. Go ahead and say it, right here right now that you never sin.
You are right in general, at least until Jesus as the Author and Finisher of our faith is finished maturing the fruit of the Spirit, but you don't seem to know there are two types of sin, so the Reformation saying of "sin is sin" is not scriptural and puts a baby Christian in a state of frustration. The Reformationists were not to leave behind the truths in Catholicism, just the junk, but they did. Revelation 3:2. But the RCC was right and scriptural that there are mortal sins (sins unto death - the breaking of a Law of God) and venial sins (sins NOT unto death - immature fruit of the Spirit. 1 John 1:7, the sins which we will commit even while walking in the Spirit.) You will find these two categories in 1 John 5:16-17.
Revelation 3:2 Be watchful, and strengthen the things which remain, that are ready to die.
Mortal Sins:
1 John 3:4-9
4 Whoever commits sin also commits
lawlessness, and sin is lawlessness. 5 And you know that He was manifested to take away our sins, and in Him there is no sin. 6 Whoever abides in Him does not sin. Whoever sins has neither seen Him nor known Him.
7 Little children, let no one deceive you. He who practices righteousness is righteous, just as He is righteous. 8 He who sins is of the devil, for the devil has sinned from the beginning. For this purpose the Son of God was manifested, that He might destroy the works of the devil. 9
Whoever has been born of God does not sin, for His seed remains in him; and he cannot sin, because he has been born of God.
Venial Sins:
2 Peter 1:2-11 (the list of venial sins are in 5-7)
2 Grace and peace be multiplied to you in the knowledge of God and of Jesus our Lord, 3 as His divine power has given to us all things that
pertain to life and godliness, through the knowledge of Him who called us by glory and virtue, 4 by which have been given to us exceedingly great and precious promises, that through these you may be partakers of the divine nature, having escaped the corruption
that is in the world through lust.
5
But also for this very reason, giving all diligence, add to your faith virtue, to virtue knowledge, 6 to knowledge self-control, to self-control perseverance, to perseverance godliness, 7 to godliness brotherly kindness, and to brotherly kindness love. 8 For if these things are yours and abound,
you will be neither barren nor unfruitful in the knowledge of our Lord Jesus Christ. 9 For he who lacks these things is shortsighted, even to blindness, and has forgotten that he was cleansed from his old sins.
10 Therefore, brethren, be even more diligent to make your call and election sure, for
if you do these things you will never stumble; 11 for so an entrance will be supplied to you abundantly into the everlasting kingdom of our Lord and Savior Jesus Christ.