Notice he completely rejects altering, the word is stronger, adulterating, the Word of God. He contrasts that with the phrase manifesting the truth to gain credibility. That indicates at least two things to me. First, he does not pull back from sharing the Word of God as it is. He expounds it accurately and clearly, see 2 Timothy 2:15. He knows as it says in Hebrews 4:12 – 13 that the Word is piercing whether the hearer likes it or not.
Second, to manifest the truth one must live consistent with it. Paul does. We cannot have a “say, do” problem. We, like Paul, have to be able to ask people to follow Christ as we are.
Tough assignment. You in?