Is it true that heavy use of marijuana is often associated with lack of ambition? My daughter, age 27, has been an admitted heavy user of marijuana (and alcohol). She seems to be very, very, what I’d call “lazy”. She has no ambition, no plans for her future that she follows through on, and only a part-time, low paid job, despite a college degree. She supports herself by affiliating with “friends” who allow her to couch surf at their place, and otherwise give her stuff (in exchange for what I do not want to know).