" Your choice of career is a choice about how to spend more than eighty thousand hours over the course of your life, which means it makes sense to invest a considerable amount of time in the decision. If you were to spend just 1 percent of your working time thinking about how to spend the other 99 percent, that would mean you’d spend eight hundred hours, or twenty working weeks, on your career decision. "

― William MacAskill , Doing Good Better: How Effective Altruism Can Help You Make a Difference