My question⁠—that which at the age of fifty brought me to the verge of suicide⁠—was the simplest of questions, lying in the soul of every man from the foolish child to the wisest elder: it was a question without an answer to which one cannot live, as I had found by experience. It was: “What will come of what I am doing today or shall do tomorrow? What will come of my whole life?”

Differently expressed, the question is: “Why should I live, why wish for anything, or do anything?” It can also be expressed thus: “Is there any meaning in my life that the inevitable death awaiting me does not destroy?”

To this one question, variously expressed, I sought an answer in science. And I found that in relation to that question all human knowledge is divided as it were into two opposite hemispheres at the ends of which are two poles: the one a negative and the other a positive; but that neither at the one nor the other pole is there an answer to life’s questions.

The one series of sciences seems not to recognize the question, but replies clearly and exactly to its own independent questions: that is the series of experimental sciences, and at the extreme end of it stands mathematics. The other series of sciences recognizes the question, but does not answer it; that is the series of abstract sciences, and at the extreme end of it stands metaphysics.

From early youth I had been interested in the abstract sciences, but later the mathematical and natural sciences attracted me, and until I put my question definitely to myself, until that question had itself grown up within me urgently demanding a decision, I contented myself with those counterfeit answers which science gives.