Sin

Whatever the Bible says it is. Focus on righteousness instead.

Refusal to yield to God's will and way. Starts in the heart.

Sin is any offence which is against God.

Sin begins in the heart.

Matthew 5
27Ye have heard that it was said by them of old time, Thou shalt not commit adultery:
28But I say unto you, That whosoever looketh on a woman to lust after her hath committed adultery with her already in his heart.

Yes, it does.

James 1:13-15

"Let no man say when he is tempted, I am tempted of God: for God cannot be tempted with evil, neither tempteth he any man: But every man is tempted, when he is drawn away of his own lust, and enticed. Then when lust hath conceived, it bringeth forth sin: and sin, when it is finished, bringeth forth death."

Forgiven

So an offense against another person, rather than against God, isn't a sin?

Whatever is not of faith. Whatever offends God's holiness or righteousness. Sin was an archery term in Greek. It meant to miss the target.

An offence against another person is an offence against God.

not being contrary just a submission. If another is offended by our faith in Jesus Yeshua, or our love for all including our enemies, I am afraid he or shee needs more information about motivation.

Hebrew words for Sin • Biblical words for sin Hebrew The Old Testament uses 6 different nouns and 3 verbs to describe

sin: ע ָר ra' This term is used more than 600 times and is most often translated as "evil" or "bad" [Strong's #7451]. It carries the implication of something that is contrary to God's nature.

ה ָא ָטּ ַח chatta'ah This term is used almost 300 times and is most often translated as "sin" or "offense" [Strong's #2403]. It carries the implication of that which is deserving of punishment.

rasha ?רָ שָׁ ע This term is used more than 250 times and is most often translated as "wicked" [Strong's #7563]. It carries the implication of something that is morally wrong.

avon עָ ווֹן This term is used more than 200 times and is most often translated as "iniquity" [Strong's #5771]. It carries the implication of being perverse, crooked or twisted.

pesha פֶּ֫ שַׁ ע This term is used almost 100 times and is most often translated as "transgression" [Strong's #6588]. It carries the implication of rebellion.

asham אָ שַׁ ם This term is used more than 30 times and is most often translated as "guilty" [Strong's #816]. It carries the implication of offense or trespass.

Jesus offended people all the time.

And what about sins of omission?

It's actually a term of art. It's an archery term that literally means "To miss the mark". The mark, in the case of God, is manifold but can be summarized in "And this is eternal life, that they may know You, the only true God, and Jesus Christ whom You have sent" and "Those who are led by the Spirit of God are the sons of God".

The truth of Jesus Christ is not an offence against God; you are wrong.

True. But it does offend some people. There are occasions when offense against others isn't sin.

Jesus Christ is not an offence against others.

Romans 9:33
“As it is written, Behold, I lay in Sion a stumblingstone and rock of offence: and whosoever believeth on him shall not be ashamed.”

1 Peter 2:8
“And a stone of stumbling, and a rock of offence, even to them which stumble at the word, being disobedient: whereunto also they were appointed.”

Jesus Christ lays a stumblingstone and rock of offence; Jesus Christ is not the offence.

1 Peter 2:8 suggests otherwise. So does Matthew 11:6...blessed are those who are not offended in Me. Some people are offended by Christ. It's also the point of Matthew 10:34 and following.

They hated Him. They hate us because of Him. He is the offense.