"A lot of people don’t think enough about choosing their career. [M]ost people spend 80,000 hours in their career, yet they don't spend such a lot of time in their choice. You would think that it's worth spending perhaps 1% of those hours to decide how you're going to spend the other 99% of those 80,000 hours. 1% of 80,000 hours is 800. How many people do you think actually spend 800 hours thinking about which career they're going to choose? That's quite a lot of time really. So it suggests that we make this very important choice perhaps without enough reflection. People ought to reflect on which career would do the most good."