'Weak' in the Bible

Who is weak, and I am not weak? Who is led astray into sin, and I am not aflame with indignation?

In fact I take pleasure in infirmities, in the bearing of insults, in distress, in persecutions, in grievous difficulties--for Christ's sake; for when I am weak, then I am strong.

For though it is true that He was crucified through weakness, yet He now lives through the power of God. We also are weak, sharing His weakness, but with Him we shall be full of life to deal with you through the power of God.