“The good which it concerns us to remember is the good which it lies in our power to create—the good in our own lives and in our attitude towards the world.”
Russell shifts attention from uncontrollable cosmic outcomes toward forms of goodness that can still be created through one’s conduct and stance toward life.
Source note: Mysticism and Logic and Other Essays, within Russell’s philosophical discussion of human value and the world. The line is preserved as ethical argument rather than converted into a promise that circumstances are controllable.