Why is [this] so dif­fi­cult for most peo­ple? because most of us were told in child­hood that the way to con­quer a dif­fi­cul­ty is to fight it and demol­ish it. That the­o­ry is, of course, the one that should be taught to young peo­ple. Many of the dif­fi­cul­ties we encounter in youth are not per­ma­nent; and the com­bi­na­tion of a hero­ic courage, a res­olute will, and a tire­less per­sis­tence will often — prob­a­bly usu­al­ly — break them down. Bu tin later years the essen­tial ele­ments in the sit­u­a­tion change. We find in our lit­tle world prison-walls which no amount of bat­ter­ing will demol­ish. With­in those walls we must spend our day — spend them hap­pi­ly, or resent­ful­ly. Under these new cir­cum­stances we must delib­er­ate­ly reverse our youth­ful tech­nique. We must gain vic­to­ry, not by assault­ing the walls, but by accept­ing them. Only when this sur­ren­der is made can we assure our­selves of inward quiet­ness, and locate the net step on the road to ulti­mate vic­to­ry.

How Not to Worry: A 1934 Guide to Mastering Life