The drops are necessary to gain the momentum needed for the next climb.
At its heart, this perspective suggests that the quality of your "ride" isn't determined by the track itself—which will always have drops—but by your reaction to it. Life Is A Rollercoaster
Just as a coaster eventually returns to the station, life's struggles are temporary phases that lead back to equilibrium. Cultural Impact: Ronan Keating The drops are necessary to gain the momentum