Yet when they do stop to think in the midst of all this frantic activity, this question may come to their minds: “If I do get this new job, if I get this better car, if I can take this trip—what then? What is the use of it all? Is it really I who wants all this? Am I not running after some goal which is supposed to make me happy and which eludes me as soon as I have reached it?” These questions, when they arise, are frightening, for they question the very basis on which man’s whole activity is built, his knowledge of what he wants.