Knowing God is watching over us can give us rest and peace even during times of crisis. It's in the Bible, Psalm 3:5, TLB. "Then I lay down and slept in peace and woke up safely, for the Lord was watching over me."
When sleepless, we can reflect on God's watchfulness. It's in the Bible, Psalm 63:6, NIV. "On my bed I remember You; I think of You through the watches of the night."
We can be secure knowing that God never sleeps, but watches over us. It's in the Bible, Psalm 121:2-4, NIV. "My help comes from the Lord, the Maker of heaven and earth. He will not let your foot slip—He who watches over you will not slumber; indeed, He who watches over Israel will neither slumber nor sleep."