Epiphanies are fleeting and basically you have to embrace the search. When you find an epiphany that works enjoy it while it lasts. The reason they don't last is because you really can't know why something works. The old feel isn't real thing.
You think it's because of A, but it might be because A causes B to work (or maybe even C) and you don't have a feel for B because you assume A is the reason you're swinging well. When one link in the dominos fails you're in trouble. It' a vicious cycle.
If riding a bike were like golf you'd fall off the bike every few days or so. The problem with golf is the margin for error is so slight with disastrous results. You hit a ball with your club face just 3 degrees open (assuming your path is square) and the ball will fly off to the right 30-40 yards. 3 degrees is like 1 minute past 12:00 on a clock.
Couple that with getting your face and path aligned and the odds are against you. Then you hit it a little high or low on the face, toe / heel side and you're screwed. Then you have your angle of attack / swing bottom etc.. So many things have to go right just to hit a decent shot that the odds are not on your side.
So, enjoy the peaks and ride out the valleys because it's the same for everyone. And the search is never ending.