2 Corinthians 13

1 Paul reminds the Corinthians that due process of law requires that there be at least two witnesses before someone is convicted. This goes for leaders as well as followers.
2 Since Paul is planning his third trip, he has already witnessed and confronted those who are sinning. If he still finds them unrepentant, he will take steps to punish them.
3 They are essentially challenging God to punish them, and Paul warns them that he can bring that punishment with power.
4 Paul reminds them that Jesus died and appeared weak to the world, but God raised Him to life again with a power beyond what men can do. In the same way Paul (and others in Christ) may appear weak, but we are backed up by the power of God.
5 We are not to measure ourselves by others, not even leaders. In the same way, we are not to measure others by our standards. Instead, there is a third and objective criteria -- God's standard.
6 If Paul were measured by God's criteria, he would make the measure.
7 Paul does not want the Corinthians to be good so that he will look good. He wants the Corinthians to be good for their own sake. Leaders should serve others to bring them to maturity.
8 The truth is the Truth of God. If we are for the Truth, we can not betray God.
9 Paul's true desire is that the Corinthians be strong and complete. The true mark of leadership is the desire to better the followers.
10 Previously, the Corinthians had accused Paul of writing tough letters but being weak in person (2 Cor 10:10). Paul here explains that he is harsh in his letters so that he will not need to be harsh in person. But he contends that he is doing this with the authority and love that has been given to him by God. He further asserts that he has not abused this authority that has been given to him.
11 Peace among equals is possible with proper organization and observance of authority.
12 A kiss is still a common greeting in the Middle East and other areas around the Mediterranean. Whether we are talking about a kiss or a handshake, a greeting should be honest and with reverence to God as much as to people. Contrast a holy kiss with the deceitful, betraying kiss of Judas (Luke 22:47).
13 Paul wanted to assure the Corinthians that they were not being separated from the Church. Paul was greeting them as a representative of the Church.
14 This final farewell indicates that he still recognizes the Corinthians as Christians. However, he is worried that they will fall away from Christ and not continue the work that he entrusted to them.