Note to self

1 He who dwells in the shelter of the Most High

will rest in the shadow of the Almighty. [a]


2 I will say [b] of the LORD, "He is my refuge and my fortress,
my God, in whom I trust."


3 Surely he will save you from the fowler's snare
and from the deadly pestilence.


4 He will cover you with his feathers,
and under his wings you will find refuge;
his faithfulness will be your shield and rampart.


5 You will not fear the terror of night,
nor the arrow that flies by day,


6 nor the pestilence that stalks in the darkness,
nor the plague that destroys at midday.


7 A thousand may fall at your side,
ten thousand at your right hand,
but it will not come near you.


8 You will only observe with your eyes
and see the punishment of the wicked.


9 If you make the Most High your dwelling—
even the LORD, who is my refuge-


10 then no harm will befall you,
no disaster will come near your tent.


11 For he will command his angels concerning you
to guard you in all your ways;


12 they will lift you up in their hands,
so that you will not strike your foot against a stone.


13 You will tread upon the lion and the cobra;
you will trample the great lion and the serpent.


14 "Because he loves me," says the LORD, "I will rescue him;
I will protect him, for he acknowledges my name.


15 He will call upon me, and I will answer him;
I will be with him in trouble,
I will deliver him and honor him.


16 With long life will I satisfy him
and show him my salvation."


-- Psalms 91
 
"A thousand may fall at your side, ten thousand at your right hand, but it will not come near you. A thousand may fall at your side, ten thousand at your right hand, but it will not come near you."  This verse, I recite over and over, every morning on my way to work. I love the entire chapter, but the 7th verse gives me peace of mind.
He didn't say 1, or 2, or 3, or 4, or 5, 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 200, 300, 400, 500, 600, 700, 800, or 900; He said a thousand may fall at my side. He didn't say 2,000, or 3,000 or 4,000 or 5,000 or 6,000 or 7,000, or 8,000 or 9,000. He said ten thousand at my right hand, but it will not come near me.   
The odds can be that overwhelming AGAINST me, but God's faithfulness will still be my shield!
 
(Keeping this in mind, why do I ever worry?)