Writer Barry Ulanov commented in 1946 that Tristano "was not content merely to feel something, ... he had to explore ideas, to experience them, to think them through carefully, thoroughly, logically until he could fully grasp them and then hold on to them." Tristano criticized the free jazz that began in the 1960s for its lack of musical logic as well as its expression of negative emotions. "If you feel angry with somebody you hit him on the nose – not try to play angry music", he commented; "Express all that is positive. Beauty is a positive thing." He expanded on this by distinguishing emotion from feeling, and suggested that playing a particular emotion was egotistical and lacking in feeling.