The first is the Ramachandran path. From within your chosen field, you look for side paths that particularly attract you (in his case the science of perception and optics). When it is possible, you make a move to this narrower field. You continue this process until you eventually hit upon a totally unoccupied niche, the narrower the better.
In some ways, this niche corresponds to your uniqueness, much as Ramachandran’s particular form of neurology corresponds to his own primal sense of feeling like an exception.
The second is the Matsuoka path. Once you have mastered your first field (robotics), you look for other subjects or skills that you can conquer (neuroscience), on your own time if necessary. You can now combine this added field of knowledge to the original one, perhaps creating a new field, or at least making novel connections between them.
Mastery by Robert Greene