Search me, God, and know my heart;
test me and know my anxious thoughts.
(Psalm 139:23)

God tests us every day, whether we ask for it or not.  He also knows that I have many anxious moments which shows my weakness and lack of faith.  I often fail His tests.  Because He knows my heart, I'm comforted that He knows why I fail His tests and offers me guidance and forgiveness to help me pass the next test.