‘For we can do nothing against the truth, but for the truth.'
This is because he is incapable of doing anything which is against the truth, because he is totally for the truth. What matters to him is the truth, both in doctrine and in life. It is only the truth and its consequences that are important, not his own reputation. His whole life is given to the expression and living out of the truth (see 2 Corinthians 11:10).