I think it also lets you reset your mind to your current situation, good or bad. So it really helps if you are in a good setting (therapist or a good friend) and your life is good now but you have a troubled past which keeps haunting you. But I think that if you are in a bad setting and or have a bad life atm than it could make you more depressed. That is why I think that when struggling people take it it could have a opposite effect and really F you up. Sucks that people mostly take these things when there life sucks atm.