no I don't agree with it.. cause it's just stupid and completely wrong mostly because well if you change yourself, the world isn't going to change, no matter how much you change yourself, the world is still going to be the horrible place it is today.. sadly, but its true
the trick is when you change yourself, your preception of the world's reality changes as well, so anyway it won't be same. I can't promise it will be less horrible and cruel, it depends on the direction you choose. think of it... cause there's no other world than the one in your mind - and even that one is only a reflection of a real world (if there's any ;-) ) , reflection created by your senses and filtered through your own system of values. u don't have to believe, personally I don't belive in anything, just think and come to your own conclusions