Carnegie combined.

As for the uselessness of worry; who is there, that has studied the
action of worry, that ever found any of the problems it was concerned
over improved by all the hours of worry devoted to it. Worry never
solved a problem yet; worry muddies the water still further instead of
clearing it; worry adds to the tangle instead of releasing it; worry
beclouds the mind, prevents sane judgment, confuses the reason, and
leads one to decisions that never ought to be made, and so to an
uncertainty, as vexatious and irritating as is the original problem
to be solved. If the worry pointed a way out of the difficulty I
would extol worry and regard it as a bitter draught of medicine, to be
swallowed in a hurry, but producing a beneficial result. But it never
does anything to help; it invariably hinders; it sets one chasing
shadows, produces _ignes fatui_ before the eyes, and ultimately leads
one into the bog.

Elsewhere I have referred to the Indians' attitude of mind. If a
matter can be changed, change it; if not grin and bear it without
complaint. Here is practical wisdom. But to worry over a thing that
can be changed, instead of changing it, is the height of folly, and if
a matter cannot be changed why worry over it? How utterly useless is
the worry. Then, too, worry is the parent of nagging. Nagging is
worry put into words,--the verbal expression of worry about or towards
individuals. The mother wishes her son would do differently. Can the
boy's actions be changed? Then go to work to change them--not to worry
over them. If they cannot be changed, why nag him, why irritate him,
why make a bad matter worse? Nagging, like worry, never once did one
iota of good; it has caused infinite harm, as it sets up an irritation
between those whose love might overcome the difficulty if it were let
alone. Nagging is the constant irritation of a wound, the rubbing of
a sore, the salting an abraded place, the giving a hungry man a tract,
religious advice or a bible, when all he craves is food.

Ah, mother! many a boy has run away from home because your worry led
you to nag him; many a girl to-day is on the streets because father
or mother nagged her; many a husband has "gone on a tear" because he
could not face his wife's "worry put into words," even though no one
would attempt to deny that boy, girl and husband alike were wrong
_in every particular_, and the "nagger" in the right, save in the one
thing of worry and its conseq