'Edification' in the Bible

For though I should boast somewhat more of our authority, which the Lord hath given us for edification, and not for your destruction, I should not be ashamed:

Have you been thinking all this time that we are defending ourselves to you? We are speaking in Christ before God, and all [these things], dear friends, [are] for your edification.

Therefore I write these things being absent, lest being present I should use sharpness, according to the power which the Lord hath given me to edification, and not to destruction.