Painful at the moment, but bring happiness later

The nation may be devasted by the superior strength of the Mongols, but the slander of the correct teaching will cease almost entirely. Defeat would be like a moxa cautery, which cures disease, or like acupuncture, which relieves pain. Both are painful at the moment, but bring happiness later. 18/6

The Writings of Nichiren Daishonin,
Many in Body, One in Mind
Written to the lay priest Takahashi on August 6, year unknown