Are you stuck?  Fail a test?  Study and retake it. 

Goliath was a problem for Saul but an opportunity for David.

James 1:2-4 KJV, MSG
Psalms 26:2 MSG
John 6:5-6 KJV
Luke 5:2-4 KJV
2 Corinthians 4:8-9 KJV