For after all, the best thing one can do when it is raining is let it rain.

The line counsels acceptance of what cannot be controlled. “Rain” functions as a plain, everyday image for adverse circumstances—grief, disappointment, delay, or any external condition that resists willpower. Rather than urging passivity in all matters, the aphorism distinguishes between what can be changed and what must be endured: when an event is already underway and beyond remedy, the sanest response is to stop expending energy on resentment and meet the moment as it is. Its calm, practical tone aligns with a broader nineteenth‑century moral tradition of stoic composure and emotional self-command.