2 Corinthians 12:9
9 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.
Definition of infirmity. 1a : the quality or state of being infirm. b : the condition of being feeble : frailty. 2 : disease, malady. 3 : a personal failing : foible one of the besetting infirmities of living creatures is egotism— A. J. Toynbee.