Strength in Weakness
And he said unto me, My grace is sufficient for thee: for my strength is made perfect in weakness. Most gladly therefore will I rather glory in my infirmities, that the power of Christ may rest upon me.
- 2 Corinthians 12:9 (KJV)
This means that when we are weak (not led by our own pride) there is room for God's strength. Otherwise our own "strength" would just get in the way.