He who watches over you will not slumber;
No matter how much I want to take care of - well, anything - my children or grandchildren, friends, someone at church that needs extra care or attention, I can only go for so long....eventually I have to sleep. It might be restless sleep, but I still have to sleep.
How wonderful to know that God never sleeps.
I suppose I could go on about it, but it seems rather self-explanatory to me. :-)
Of course there are great graphics for all of the psalm.