Dwell not upon thy weariness, thy strength shall be according to the measure of thy desire.

The proverb links stamina to attention and intention: if you fixate on fatigue, you amplify it; if you keep desire—purpose, aspiration, or will—at the center, you discover reserves of strength. “According to the measure of thy desire” frames energy as partly motivational and partly self-fulfilling: the intensity and clarity of what you want shapes how much hardship you can bear. It is not a denial of exhaustion so much as a counsel about mental framing—directing thought away from complaint and toward the goal—implying that perseverance is cultivated by focusing on meaning rather than discomfort.