Sometimes I just feel like quitting, but then I think about all the people I’d be letting down.
有时候我真想放弃,但想到会让很多人失望,我就坚持下来。
你的时间有限,所以不要浪费它去过别人的生活。
即使世界改变,我也不会改变。
The boundaries of our knowledge are the frontiers of our imagination.