What is Sin?
There are a few different definitions of sin given in the Holy scriptures.
In 1 John 5:17 we read that “All unrighteousness is sin.”
In Romans 14:23 we read that “Whatsoever is not of faith is sin.”
In 1 John 3:4 we read that "sin is the transgression of the law."
In James 4:17 we read that whosoever does not do the good he knows he should do sins.
In 1John 1:7 -10 we read;
“But if we walk in the light, as he is in the light, we have fellowship one with another, and the blood of Jesus Christ his Son cleanseth us from all sin. If we say that we have no sin, we deceive ourselves, and the truth is not in us. If we confess our sins, he is faithful and just to forgive us our sins, and to cleanse us from all unrighteousness. If we say that we have not sinned, we make him a liar, and his word is not in us.”
In Proverbs 24:9 we read that “the thought of foolishness is sin”
By these scriptures we can see that the Blood of Jesus Christ cleanses us from sin and that he is faithful to cleanse us from all unrighteousness, if we confess our sins. We also see that we can sin either by doing something or by not doing what we should.
“For to be carnally minded is death; but to be spiritually minded is life and peace.” - Romans 8:6
“For the wages of sin is death; but the gift of God is eternal life through Jesus Christ our Lord. - Romans 6:23
“My little children, these things write I unto you, that ye sin not. And if any man sin, we have an advocate with the Father, Jesus Christ the righteous: - 1 John 2:1
Other Recommended verses that might be good to read with this are John 8:34, John 16:7-13, 1 John 2:1-2, Romans 6:2-23, Romans 8:1-17.