Adam Clarke on 2 Corinthians 1:8

For we can do nothing against the truth, but for the truth - As we are the apostles of God, we cannot bring to you any false doctrine; and, as we profess to be under the influence of God's Spirit, we cannot do any thing that is opposed to that truth, or which might be prejudicial to it. On the contrary, what we say and do is for that truth, to propagate and establish it. The Gospel of Jesus is truth; and my testimony concerning it is truth also. In my coming, and in my rod, you have nothing to fear, if you retain and abide in this truth.