“Ye Are Beginning to Labor in Sin”

"The sins of the people in Jacob's day were not inadvertent transgressions; they had begun to 'labor in sin' in the sense that sin had become their obsession and their preoccupation. They had begun to flirt with that spirit which characterized the wickedness of the days of Noah: 'And every man was lifted up in the imagination of the thoughts of his heart, being only evil continually' (Moses 8:22)." (McConkie and Millet, Doctrinal Commentary on the Book of Mormon, vol. 2, p. 11)