'Weak' in the Bible

because some say, "His letters are weighty and forceful, but his physical presence is weak and his speech is of no account."

(To my disgrace I must say that we were too weak for that!) But whatever anyone else dares to boast about (I am speaking foolishly), I also dare to boast about the same thing.

Who is weak, and I am not weak? Who is led into sin, and I do not burn with indignation?

Therefore I am content with weaknesses, with insults, with troubles, with persecutions and difficulties for the sake of Christ, for whenever I am weak, then I am strong.

since you are demanding proof that Christ is speaking through me. He is not weak toward you but is powerful among you.

For indeed he was crucified by reason of weakness, but he lives because of God's power. For we also are weak in him, but we will live together with him, because of God's power toward you.

For we rejoice whenever we are weak, but you are strong. And we pray for this: that you may become fully qualified.