2 Corinthians 10:10

For, His letters, they say [a general expression, equivalent to "it is said"], are weighty and strong; but his bodily presence is weak, and his speech of no account. [Now even if I boast most freely that my authority is greater than yours, my boasting will not bring shame upon me if you put me to the test. You will find that I am not terrible in letters alone, but also in my presence, and you will find how falsely you have spoken when you said that my letters were the only part of me calculated to cause fear. However, I shall regret to thus demonstrate my power against you, for God gave me this power to use rather in building you up than in tearing you down. The apostle thus draws a subtle contrast between himself and his adversaries, for they had delighted in destructive rather than constructive works.]