 Although most psychology researchers consider meaning in life as a subjective feeling or judgment, most philosophers (e.g., Thaddeus Metz, Daniel Haybron) propose that there are also objective, concrete criteria for what constitutes meaning in life.Wong has proposed that whether life is meaningful depends not only on subjective feelings but, more importantly, on whether a person's goal-striving and life as a whole is meaningful according to some objective normative standard.The philosophical perspectives on the meaning of life are those ideologies that explain life in terms of ideals or abstractions defined by humans.