you see a dead cat splattered on the road in front of your house after a car just drove by. you feel upset and saddened. but as soon as you see it was just a pile of wet soggy leaves that was run over and not a cat you are relieved... it was perception. change it and you can feel anything you want. everything can change because what was so wrong is now normal and acceptable due to a change in perception. an old favorite aunt dies and you cry yourself to sleep. with a change in perception you now accept dying as a natural and normal part of life and appreciate the time spent with her and cry no more. you perceive that you are living on a giant rock hurtling through space around a giant sphere of fire and suddenly the thought of how you look in those pair of jeans becomes meaningless. you are upset driving on the highway because you were cut off by some car that is speeding off ahead of you. you later see that car parked at the hospital with a pregnant woman stepping out about to give birth and suddenly you are not upset anymore. change your perceptions and a whole new world opens up to you. it will be any world you want because it's all how you perceive it.