Whatever the faith may be, and whatever answers it may give, and to whomsoever it gives them, every such answer gives to the finite existence of man an infinite meaning, a meaning not destroyed by sufferings, deprivations, or death. This means that only in faith can we find for life a meaning and a possibility. What, then, is this faith? And I understood that faith is not merely “the evidence of things not seen,” etc. , and is not a revelation (that defines only one of the indications of faith), is not the relation of man to God (one has first to define faith and then God, and not define faith through God); it is not only agreement with what has been told one (as faith is most usually supposed to be), but faith is a knowledge of the meaning of human life in consequence of which man does not destroy himself but lives. Faith is the strength of life. If a man lives he believes in something. If he did not believe that one must live for something, he would not live. If he does not see and recognize the illusory nature of the finite, he believes in the finite; if he understands the illusory nature of the finite, he must believe in the infinite. Without faith he cannot live.

And I recalled the whole course of my mental labour and was horrified. It was now clear to me that for man to be able to live he must either not see the infinite, or have such an explanation of the meaning of life as will connect the finite with the infinite. Such an explanation I had had; but as long as I believed in the finite I did not need the explanation, and I began to verify it by reason. And in the light of reason the whole of my former explanation flew to atoms. But a time came when I ceased to believe in the finite. And then I began to build up on rational foundations, out of what I knew, an explanation which would give a meaning to life; but nothing could I build. Together with the best human intellects I reached the result that 0 equals 0, and was much astonished at that conclusion, though nothing else could have resulted.

What was I doing when I sought an answer in the experimental sciences? I wished to know why I live, and for this purpose studied all that is outside me. Evidently I might learn much, but nothing of what I needed.