Sin is doubting or disobeying Jehovah. If Jehovah isn't real, then sin isn't real either.
Don't conflate sin with evil. Evil (things that make people unhappy) is the punishment for sin. Evil exists regardless of whether gods exist.
Moral evils are one reason why people conflate sin and evil. Gluttony, for instance, is disobedient, but it can also make people unhappy. So, sometimes it is both a sin and an evil.
Sin is doubting or disobeying. Doubt is the bigger part. Eve's first sin wasn't when she bit the apple; it was when she entertained the serpent's argument that god didn't have her best interests in mind.
Don't conflate sin with evil. Evil (things that make people unhappy) is the punishment for sin. Evil exists regardless of whether gods exist.
Moral evils are one reason why people conflate sin and evil. Gluttony, for instance, is disobedient, but it can also make people unhappy. So, sometimes it is both a sin and an evil.
Sin is doubting or disobeying. Doubt is the bigger part. Eve's first sin wasn't when she bit the apple; it was when she entertained the serpent's argument that god didn't have her best interests in mind.