2 Corinthians 10:8 (KJV)

For though we walk in the flesh, we do not war after the flesh:

(For the weapons of our warfare are not carnal, but mighty through God to the pulling down of strong holds;)

Casting down imaginations, and every high thing that exalteth itself against the knowledge of God, and bringing into captivity every thought to the obedience of Christ;

And having in a readiness to revenge all disobedience, when your obedience is fulfilled.

Do ye look on things after the outward appearance? If any man trust to himself that he is Christ's, let him of himself think this again, that, as he is Christ's, even so are we Christ's.

That I may not seem as if I would terrify you by letters.

For his letters, say they, are weighty and powerful; but his bodily presence is weak, and his speech contemptible.

Let such an one think this, that, such as we are in word by letters when we are absent, such will we be also in deed when we are present.

For we dare not make ourselves of the number, or compare ourselves with some that commend themselves: but they measuring themselves by themselves, and comparing themselves among themselves, are not wise.

But we will not boast of things without our measure, but according to the measure of the rule which God hath distributed to us, a measure to reach even unto you.