Let us look at it this way. You do a degree you hate just for the money, you get a good job and earn about 20,000 per month but then midlife crises hits you so you quit. Say you work for about 10 years? So that's 20,000×12×10 (do the math). But then you do something you are so passionate about and earn say 5,000 a month- less right? But then you love your job so much you work till you're 60 so that's about 35-40 years. So 5,000×12×35 (do the math).