I'm in serious pain tonight!

Tonight I'm sitting on the couch and I can barely move. My leg, forearms, wrists, fingers, calves, ankles, ass, thighs, shins, back, and some extra muscles I'm sure are in serious pain. I went for a run yesterday and then played Squash for the first time in two years. I feel like I worked really hard, you know trying to feel the burn because it's good for you........ Why is it that things in life that feel so good are usual so terrible and things that don't feel that great are usually what will benefit you in long run.
Running is just one example, it's painful and you have to push through the pain of your body wanting to stop, but once you get through it somehow the pain opens up and you're like wow I feel great why don't I do that more often. Shouldn't something like running just feel fantastic all the time and the something like eating fatty junky food feel terrible. I know some people will say yes I love running and hate junk food, but I mean real people who admit to loving their weaknesses.
Mmmmm I'm eating a box of chocolate covered cherries from Starbucks as I write this. That's the real reason I run, so I can eat as many of these I want and not suffer the consequences.

This is totally not related but I'm going to mention it anyways. Today in, "Church" our pastor was making a point about everyone being equal and the message of reconciliation. To be honest my mind was daydreaming and I missed most of his arguments, but then he stated, "because you could argue that some people are more evolved than others, and if that's the case then some people would be worth more." I know he was only trying to make a point but I just looked up and thought, what you really think you could argue that, wow!