He meditated on the use to which he should put all the energy of youth which comes to a man only once in life. Should he devote this power, which is not the strength of intellect or heart or education, but an urge which once spent can never return, the power given to a man once only to make himself, or even - so it seems to him at the time - the universe into anything he wishes: should he devote it to art, to science, to love, or to practical activities? True, there are people who never have this urge: at the outset of life they place their necks under the first yoke that offers itself, and soberly toil away in it to the end of their days.