According to Merriam-Webster the definition of "rest" is - a period of inactivity, relaxation, or sleep to recover from fatigue. According to the gospel the definition of "rest" is - the enjoyment of peace and freedom from worry and turmoil. The Lord has promised such rest to His faithful followers during this life. He has also prepared a place of rest for them in the next life. See also Peace; Sabbath Day. The definition of "complacency" according to Merriam-Webster is - a feeling of quiet, contented self-satisfaction with your current situation. Because you are so satisfied with the status quo, you become uncritical and unaware of potential risks, flaws, or the need to improve. It is often viewed negatively because it leads to a lack of effort or vigilance. A gospel definition of complacency that I found was in Doctrine and Covenants 58:29-30 which says, "But he that doeth not anything until he is commanded, and receiveth a commandment with doubtfu...