Yeah, which in some cases is wise but might not always be. Like, let's say you want to major in Sports. This might make you happy on the long term, but if you (in 99% of the cases) are not able to take care of your family and live your live like you'd want it to, etc, this might be a bad decision for you.
If you decide to live on the street to rebel against society, this might make you happy on the short term, but real happy you won't be this way.
Depends on how determined we are. If we give up after a while, we will be sad in the long term.
But if we keep going on till we achieve what we wanted, we will be happy throughout the life.
Which also depends on how realistic our goals are.
It doesn't matter how determined you are, but there is a high chance you will never become an Astronaut, Movie Star, Singer or similar.
There are things which need more than determination, they need skill or in the case of Singer and Movie Star essentially a lot of luck.
In the case of Astronaut, I even say, if you have the skills, you are young and have the education, go for it. Even if you don't become an Astronaut, something good you'll do. In the case of the other do, not as much.
I never believed in luck but determination. I can not impose my opinion on you, but I have seen very very few cases in my life that if someone wanted something in his life and he tried for it every day, he didn't get it. Unless anyone quits, he will definitely achieve it.
I have tried it, I didn't believe it before that if we keep trying we can achieve whatever we want, our past experiences make our opinions and what we believe in our life.
I have lots of experiences when I myself have achieved more than what I wanted by pure determination.