What can we learn from the cycle of the moon, how she ever waxes and wanes and waxes again?

That a time of smallness is a time to become great;
And a time of greatness is a time to become small.

For in smallness lies the power to receive
and in receiving lies the power to become great.

And greatness endures only through its power to be small.

Vayakhel-Pekudei 5732:1. 5740:5. Torat Menachem 5742, vol. 3, p. 1372.