Life is a sinus wave, high and low belongs together. If life would be always at the same level so it would 'nt be really life. You could'nt feel the Joy (high) so deep if you would'nt come from the sorrow (down) and vice verso. Like Osho sayd about joy and sorrow: "joy are the branches which want to get up into the sky, and sorrow are the roots which want to go down into the ground. Each of both can not be without the other, its like a tree"
