In sooooooooooooooooooooooo many ways. Sorrow takes very little effort. It requires no money, as a matter of fact no money often leads to sorrow. But sorrow, is real. Sadness requires only it's aknowledgement. Happiness on the other hand. Happiness takes work. It doesnt always need money, but more money can lead one towards happiness. It is that very phenomena that leads people to not better themselves. People tend to get comfortable with their surroundings, their environment. It may not be what they had wanted for themselves, but to go from where they are at, to pure happiness, would require effort that for many people, either the desire isnt their, or lack of ability prevents. If you want a great paying job with a great career for example, one might go back to school and get a degree. Well that takes a ton of moolah, extra time in the day, etc. As I enter back into my relationship with my wife, I realized that happiness isnt going to just come to me. I have to work for it. So does she. I may have been in great pain and cried harder than I ever had before last Christmas day, but....sorrow is a simple emotion, isnt it?