Researchers are smart. They know stuff and they know how to generate new knowledge. But that's not enough to make a great scientist, because great science often takes a long time. There are precious few dopamine hits in science. A few that I can think of are:
- Making a breakthrough discovery
- Getting a paper accepted into a prestigious journal
- Giving a conference presentation and getting positive feedback
- Seeing students really understand a concept for the first time
- Sharing science with the public in a way that they obviously appreciate
- Applying basic research to solve a real-world problem and seeing tangible benefits
To be a great scientist, you have to be able to navigate from oasis to oasis in the Desert of Failure; being intelligent and knowledgeable is not enough; you also have to have the persistence to keep pushing toward the next oasis, even when you are not sure where it might be or when you might get there.