We have to accept the little facts of life. Bland indifference is a start, but cheerful whistling is even better.
Thanks @kitt for the link to this.

Some things in life are badThey can really make you madOther things just make you swear and curseWhen you're chewing on life's gristleDon't grumble, give a whistleAnd this'll help things turn out for the bestAndAlways look on the bright side of lifeAlways look on the light side of life
https://m.youtube.com/watch?v=SJUhlRoBL8M