2 Corinthians 12:9

He said to me, “My grace is sufficient for you, for My strength is made perfect in weakness.” Therefore most gladly I will rather boast in my infirmities, that the power of Christ may rest upon me. 

We need to be like Paul and learn that our strength comes from God. Grace is unmerited favor of God and the power that helps us in our weakness. God shows His strength and power when we let Him do the work because our abilities cannot overcome the evil in this world. We need God, and when we humble ourselves and let God work through our infirmities, the power of Christ will rest upon us.