极大的苦难 meaning in English

excruciating misery

Only i knew that it was master who had saved my life . i also understood that she was using the little injury i got to burn up some karma that i had to repay . on the other hand , master was enduring great suffering to clean up the remaining greater part of that karma
大家都觉得很惊讶，说我必定有神佛的庇佑才能逃过一劫，也恭喜我大难不死也有后福，只有我心里明白是师父救了我一命，师父为了要消我的业障，只让我承受一点点小伤，她自己却要承担极大的苦难来消除我剩下的大部分业障。