Custom is custom: it is built of brass, boiler-iron, granite; facts, reasonings, arguments have no more effect upon it than the idle winds have upon Gibraltar.
A man's usefulness depends on his living up to his ideals insofar as he can. It is hard to fail but it is worse never to have tried to succeed. All daring and courage, all iron endurance of misfortune, make for a finer, nobler type of manhood. Only those are fit to live who do not fear to die; and none are fit to die who have shrunk from the joy of life and the duty of life.
Really living without clutter takes an iron will ... This involves eternal watchfulness and that oldest and most relentless of the housewife's occupations, picking up. I have a feeling that picking up will go on long after ways have been found to circumvent death and taxes.
Even a superficial glance is sufficient to show that all the innumerable forms in which the life-urge of Nature manifests itself are subject to a fundamental law - one may call it an iron law of Nature - which compels the various species to keep within the definite limits of their own life-forms when propagating and multiplying their kind.
The nitrogen in our DNA, the calcium in our teeth, the iron in our blood, the carbon in our apple pies were made in the interiors of collapsing stars. We are made of starstuff.