how to prove the phrase, you must experience pain before you can appreciate joy:

set aside several hours. then, select a cold, hard surface. sit yourself as comfortably as you can, making sure your hands are free. focus all your attention on a delicate and exacting task. make sure the lighting is poor but inconsistent and that the ambient temperature of the room is slightly too warm. after maintaining this position for the alotted time, stand up.

strrrrreeeeetch.

see what i mean?