Gian-Carlo Rota is a writer of such crystal clear and beautiful prose, conveying the essence in an unconvoluted and direct manner. If your interests lie in the intersection of mathematics, science and technology and well written prose, I warmly recommend the book.
I will give you a talisman. Whenever you are in doubt, or when the self becomes too much with you, apply the following test. Recall the face of the poorest and the weakest man [woman] whom you may have seen, and ask yourself, if the step you contemplate is going to be of any use to him [her]. Will he [she] gain anything by it? Will it restore him [her] to a control over his [her] own life and destiny? In other words, will it lead to swaraj [freedom] for the hungry and spiritually starving millions?
Then you will find your doubts and your self melt away.