The feeling that you don't quite know enough, and can't decide on the best direction.
The impulse to seek knowledge to bridge the chasm between where you are and where you want to go.
The eagerness with which you listen to topic authorities, only to feel let down after because you still don't understand how they arrived at success.
The mentors to meet with for lunches who became successful during a different era that themselves can't seem to recapture the old flame.
The peer group you join, where smart people spend time. But most are just aping the things they've heard and have no direct experience with success.
You can't fill the gaps, not for certain, and not permanently.
The gaps between the things we know are best filled with the things we do.
Pick a direction, go a ways, test the wind, repeat.