“it is absolutely almost always easier to lie, even for those that do not like to do it too often. It takes real strength to put the truth out on the table.” But Lucifer tended to tell the truth because he was exhausted by the darkness that he had been surrounded by for centuries.
“strength doesn’t last long. you can tell the truth, but a lie is what people usually want – no, expect to hear.” plus it was easier; if he told the truth more often, he’d have been dead a long time a go, or… in a worse position than he currently was in. “as the saying goes? a little lie goes a long… long away.”