'Infirmity' in the Bible

if to boast it behoveth me, of the things of my infirmity I will boast;

and He said to me, 'Sufficient for thee is My grace, for My power in infirmity is perfected;' most gladly, therefore, will I rather boast in my infirmities, that the power of the Christ may rest on me:

for even if he was crucified from infirmity, yet he doth live from the power of God; for we also are weak in him, but we shall live with him from the power of God toward you.