DON'T STAND WITH YOUR BACK TO THE SUN.
This is one of the Scout mottoes.
Every Scout knows that when you examine footmarks on the ground, you should generally do so facing the sun, have them between you and the light, and you will see them all the better.
But that is not the meaning of this text; it has a second and bigger meaning.
It means that when there is any sunshine or brightness possible, look out for it when you are in trouble or misfortune, and make the most of it.
If you feel inclined to grumble at your lot because you have damaged your leg and can't play in a game of football, think of other poor cripples who never can play at all.
However down on your luck you may be, remember there is a bright lining to every cloud. There is some brightness somewhere, if only you look out for it and don't turn your back on it.
When things are looking their worst, and everybody is depressed, make up your mind that you, at any rate, will be hopeful.
Try to see where there is hope.
Remember St. Paul said that God was the "God of Hope." Hope gives you pluck and comfort at a bad time, and your hopefulness will comfort others round you and nerve them to stick it out.