Postmodern Joe:
Today's most influential philosophy is Postmodernism, wherein lies "a typical postmodernist conclusion, that universal truth is impossible, and relativism is our fate." So Joe himself has never believed in truth, and neither does his staff. Further, Marxists believe there is no human nature, that we are here by luck and evolution, there is no God to intervene, and there are no grand narratives to guide us. So, if Joe believes there is no truth, then why not constantly lie, since life is about gathering power, anyway?!!
Joe, Great Man:
Another reason Biden lies is he apparently believes he is a great man, being Tom Wolfe's Man in Full, a humanist saving humanity (by secretly living as a grasping opportunist and deluded bamboozler). Or so it would seem, listening to the insane blather emanating from his deranged news conferences. Here Joe simultaneously claims gravity has been reversed, there is no cause and effect, truth is only perception, and that Americans trapped behind enemy lines "really wanted to stay, anyway." It's easier to see oneself as a knight on on a white horse, instead of a fatuous old windbag, a greedy & pathological liar who raised his son in his own image. That is, to be a beggar from great nations and a psychopathic con-artist, any day of the week and seven ways from Sunday.
Magical Thinking:
Serious Marxists like Biden fall also into Magical Thinking… "the belief that one’s ideas, thoughts, actions, words, or use of symbols can influence the course of events in the material world. Magical thinking presumes a causal link between one's inner, personal experience and the external physical world.” This is related to Mystical Marxism. This teaching if “rebels” help assemble angry mobs, symbolic poor, a Marxist cadre, and violent revolution, a utopian miracle will suddenly appear like a newborn unicorn under a perfect rainbow.