A quote from the video that I find meaningful:
Those of you who are doing a job or a career, whatever it is, and you find yourself so drained instead of being energised by what you are doing, it has become a drudgery, this is not your life. This is not your vocation. In fact, you are destroying yourself. You will be making a living, but you will never live.
— Archbishop William Goh (At around 3:46 of the video.)
Singapore Maths Tuition 