Answer:
The following is adapted from An Introduction to Buddhism, which serves as study material for the SGI-USA Introductory Exam offered annually in October.
In the course of practicing Buddhism and working for kosen-rufu, we will inevitably face obstacles, negative influences and functions that attempt to block our way or interfere with our efforts.
Nichiren Daishonin taught that to encounter such opposition is in fact a benefit. That is because by meeting and winning over difficulties, we naturally carry out the process of “lessening our karmic retribution.” The characters for the Japanese phrase tenju kyoju, often translated as “lessening one’s karmic retribution,” can literally be read “transforming the heavy and receiving it lightly.” Left alone, the bad causes we have accumulated over many lifetimes reveal themselves as miserable results in this and future lifetimes. But through the benefit of devoting ourselves and leading others to the Mystic Law, the heavy consequences of our karma can quickly be lightened.