Momentum is stored effort returning to help.

Effort does not simply disappear once spent. It gets stored in the form of skills you no longer think about, materials already prepared, relationships already established, and problems already solved, and all of that comes back later as help you did not have to arrange. What feels like a lucky stretch is usually a withdrawal from an account you filled some time ago.

When a period of hard work seems to be producing nothing, remember that most of it is being deposited rather than spent. Keep going and keep the deposits deliberate. The return tends to arrive later and larger than the effort suggested at the time.