Two of my maternal grandfather's favorites were
Jack London and RW Service.
I first read this as a lad. It appealed to me then, It has stuck with me these many years and appeals to me now.

Perhaps you may enjoy it also.

Best
GWB

Grin
By RW Sevice

If you're up against a bruiser and you're getting knocked about --

Grin.

If you're feeling pretty groggy, and you're licked beyond a doubt --

Grin.

Don't let him see you're funking, let him know with every clout,
Though your face is battered to a pulp, your blooming heart is stout;
Just stand upon your pins until the beggar knocks you out --

And grin.

This life's a bally battle, and the same advice holds true

Of grin.

If you're up against it badly, then it's only one on you,

So grin.

If the future's black as thunder, don't let people see you're blue;
Just cultivate a cast-iron smile of joy the whole day through;
If they call you "Little Sunshine", wish that THEY'D no troubles, too --

You may -- grin.

Rise up in the morning with the will that, smooth or rough,

You'll grin.

Sink to sleep at midnight, and although you're feeling tough,

Yet grin.

There's nothing gained by whining, and you're not that kind of stuff;
You're a fighter from away back, and you WON'T take a rebuff;
Your trouble is that you don't know when you have had enough --

Don't give in.

If Fate should down you, just get up and take another cuff;
You may bank on it that there is no philosophy like bluff,

And grin.