Look ahead in life and we all, to some degree, experience anxiety. 5 times in this short eight-verse psalm the writer uses the word. The Lord is always on guard. The Lord is your shade on your right hand. And we are given the picture of an army guard, patrolling the perimeter of the camp, weapons always on the ready, letting no noise or suspicious movement go unnoticed.
Nothing gets past without permission.
And Psalm 121 gives us the assurance that indeed God DOES watch, and he certainly DOES have the power and ability to protect his people. Many things in life are not certain - there are mountains and there are valleys. At times these mountains, the big obstacles, are not to be feared as much as the hills, the smaller obstacles. Often small things tend to become a source of daily anxiety and irritation. Listen to the words of one who called himself a shepherd, a night watchman shepherd, caring for his sheep through the dark hours when terror stalked them and threatened their existence.