He is too great a natural philosopher to be engaged in so foolish and unnecessary a business.

He has a better practical system of life than has his white and civilized (!) brother who worries, for he says: Change what can be changed; bear the unchangeable without a murmur.

With this philosophy he braves the wind and the rain, the sand, and the storm, the extremes of heat and cold, the plethora of a good harvest or the famine of a drought.

If he complains it is within himself; and if he whines and whimpers no one ever hears him.

His face may become a little more stern under the higher pressure; he may tighten his waist belt a hole or two to stifle the complaints of his empty stomach, but his voice loses no note of its cheeriness and his smile none of its sweet serenity.
Why should the rude and brutal (!) savage be thus, while the cultured, educated, refined man and woman of civilization worry wrinkles into their faces, gray hairs upon their heads, querelousness into their voices and bitterness into their hearts?
When we use the word "worry" what do we mean?
The word comes from the old Saxon, and was in imitation of the sound caused by the choking or strangling of an animal when seized by the throat by another animal.
We still refer to the "worrying" of sheep by dogs--the seizing by the throat with the teeth; killing or badly injuring by repeated biting, shaking, tearing, etc.