The consequences were felt immediately. Physical death would come. Their disobedience affected their physical being so that deterioration set in that would eventually lead to death. The ground was cursed. As descendants of Adam and Eve would have a sinful nature.
Sin is an evil that is dangerous because it is deceptive.
Legalists make their lists of acts and forget about attitude. What man fails to understand is the same thing Adam and Eve needed to recognize. To be righteous is to be what God wants. Today, man's view of sin has been greatly influenced by the Roman Catholic view of sin. These are described as murder, sexual sins and attending Protestant churches.