I like the Terry Pratchett definition, "When you treat people as things".

I prefer to not allow religions to co-opt words that I find useful, and ascribe specialised meaning to them. Evil and sin, are useful; they require no deities or beliefs, shared or otherwise, to comunicate their meaning to others.

The 'Seven Deadly Sins' stand alone, without recognising their supposed origination with Thomas Equinas (?). Gluttony, for example, is sinful for its detrimental effects on a person, both physical & psychological; it has nothing to do with a deity or afterlife.

Contradicting myself ... Immorality is a word I mostly avoid, sadly; because it is so tightly intertwined with religiosity. I prefer to use unethicality or unethicalness, and judgement based on unethical behaviours. Ethics having a presumed (debatable) standard; one that is set higher than legality, professionalism, & scruples.

I haven't cared, when I was described as immoral. But, to be said to be unethical, inequitable, dishonourable, or 'evil', would definiting sting.
Ethical, respectworthy & honourable are better compliments, than moral. To have integrity is more valued, than to have 'good morals'.

Since god created satan, doesn’t that make him the master of evil?

Putting ice in a single malt whisky is a sin, period.

Very well put.

Both words are subjectively defined. The difference is "sin" is purely based in religious notions...."against God." Throw it out. It is useless to us. "Evil" means bad or with malice. That is a useful words that religionistas have conflated with sin and "the devil." But we have just as much right to appropriate it as they do. Evil is as valid ( again, subjectively defined) as heinous, malicious, psychopathic, vile, reprehensible, inhumane, unconscionable, detestable, etc.

No sin, no evil. There's a perfectly good word act of violence above the norm... heinous. That's the one I use instead of evil.

Sin and evil are religious concepts and like their mythical gods are imaginary.

The thing about sins is this.

Half are fun as fuck.

The other have put you in jail lol

Sin is simply "missing the mark." Paul said we all miss the mark and what he was comparing here was shooting arrows at a target. We "all sin" means that we try but we all "miss the mark." With so much talk about sin, what is a sin, and is this or that a sin, it has always made more sense to me to view it as Paul explained it. Keep in mind that I am also not a fan of St. Paul.

Sin is an immoral act considered to be a transgression of divine law. ... According to Augustine of Hippo (354–430) sin is "a word, deed, or desire in opposition to the eternal law of God," or as scripture states, "sin is the transgression of the law." [This pertaining to the laws for the nation of Israel prior to 2000 years ago, often referred to as laws of Moses]

Among some scholars, sin is understood mostly as legal infraction or contract violation of non-binding philosophical frameworks and perspectives of Christian ethics, and so salvation tends to be viewed in legal terms.

[en.m.wikipedia.org]

Have you "ran" a stop sign with out completely stopping? Then you have violated a law which by definition is a sin.

Sin can also be a wrong committed even if there is not a specific government law. Committing an illogical fallacy can be construded as a sin.

I will not harm others physically except in dire self defense.
I will not steal fom others.
I will not lie for self benefit or to try to cover up a mistake or slack on my part.
Half of the Big Xtian 10 are offenses against an imaginay thing which is absolute bullsht.

About the only time I mention "god" is when it's closely followed by "damn."

God and sin were created by humans to control humans.

To me, sin is just a religious word to control and punish and induce fear in people. It's simply a matter of right and wrong. Morality or immorality. Evil or good.

Something can be evil, wrong or criminal without being a sin
Sin connotes something specifically forbidden by or against the religious or spiritual.
Eg. The ultimate sin is Blasphemy and there is no such thing as blasphemy to an atheist, likewise there is no "sin"

Exactly why I don’t discard words like spirit and god.