If we are ever in doubt about what to do, it is a good rule to ask ourselves what we shall wish on the morrow that we had done.

The quote recommends a simple test for moral and practical uncertainty: imagine tomorrow’s hindsight and choose the action you would most want to have taken. It shifts decision-making from immediate pressures to longer-term evaluation, using anticipated regret as a guide. Implicitly, it favors actions that are defensible to one’s conscience and consistent with enduring aims—often meaning courage, honesty, or diligence over convenience. The “morrow” device also suggests that clarity often arrives after the moment passes; by borrowing that clarity in advance, one can act more deliberately. It is a compact Victorian formulation of reflective, future-oriented ethics.