God has it all under control but each person must believe or the control freak comes out and causes lots of stress and anxiety. The author, Elizabeth Elliott put it well.
"If you believe in a God who controls the big things, you have to believe in a God who controls the little things."
Let's look at some scripture to gain more insight into the meaning of this quote.
Luke 12:7
Indeed, the very hairs of your head are all numbered. Don't be afraid; you are worth more than many sparrows.
Psalm 139:17-18
How precious to me are your thoughts, O God! How vast is the sum of them, Were I to count them, they would outnumber the grains of sand. When I am awake, I am still with you.
Phillipians 4:6
Don’t worry about anything; instead, pray about everything. Tell God what you need, and thank him for all he has done.