different people, different goals
when you achieved something great at a point, you want it more.
people are not satisfied when they did not achieve something they want or set
whilst some people are already satisfied with what they've got although it's not as great.

all these because of the different expectations of themselves =)

for example:
Person A always gets 95 marks for his math exam. But this time round he got 85.
In this case he's upset & not satisfied.
Person B always get 70 marks for his math exam. But this time round he got 80.
In this case he is very happy already.

comparison: person A gets higher marks than person B but A is still not happy cos he didnt got what he wants like if he sets for let say 100 but just gotten 85. But B is happy cos he achieved his target!

eh, get the point? hahaha, strictly not refering to anybody out there...the example is just a bi yu and is not shooting at anyone...cos i dunno how to write properly to let ppl understand. haha. hmmmm...

my main point is just wanna say
different people have different expectations of themselves.

LOL. :p

the following is extracted from
http://www.stevepavlina.com/blog/2005/06/self-discipline/ (can go see if interested)

"Similarly, if you're very undisciplined right now, you can still use what little discipline you have to build more. The more disciplined you become, the easier life gets.
Challenges that were once impossible for you will eventually seem like child's play.
As you get stronger, the same weights will seem lighter and lighter.
Don't compare yourself to other people.
It won't help. You'll only find what you expect to find.
If you think you're weak, everyone else will seem stronger.
If you think you're strong, everyone else will seem weaker. There's no point in doing this.
Simply look at where you are now, and aim to get better as you go forward."