There are two distinct kinds of successful people. There are what I call the river people and goal people.
River people seem born to spend their lives in pursuit of their interest.
I believe that each of us, because of the way our genetic heritage is stacked, has an area of great interest. And it's that area that we should explore with the patience and assiduity of a paleontologist on an important dig where it's a region of great potential.
If we can find our river of interest, we need only throw ourselves into it, fully committed, and there spend our days learning and growing and finding new emerging fields of interest within its boundaries.
The second group of successful people are those who are goal-oriented. These people have not found a particular river, necessarily, and can be quite happy doing a number of things. It's the goals they set that are important to them, and they're quite aware that there are many roads that can lead to their goals.
One of the problems with this latter group is that after achieving a number of goals and becoming quite successful, they can run out of goals and become listless and unhappy. But not the river people. Their interest in what they're doing never fades.