The apostle has been speaking about the necessity that he feels, like a great burden upon him, to preach the gospel. He feels a debt to Christ, who saved him from condemnation; he has a strong sense of commission from God, and he must honour that; he has a great burden for the lost, and great joy in preaching the good news.
Consider, for instance, the question of whether a preacher should comment on political matters. Well, that is not his business. Supposing preachers did intrude into this territory. Supposing it were to be known that a pastor supported this party or that party, or advocated this or that political ideology. The result would be that half the community would be much less inclined to listen to what is much more important: the gospel, the word of God. He would carry a label which some would disapprove of. So if he makes himself the servant of all, he keeps those things to himself. Unless preachers are talking about moral matters which would apply to all political shades of opinion, they don't declare what they support, or how they would vote: that is a private matter. What are the preacher’s qualifications for advising on such things anyway? Everybody must have their own view, and come to their own conclusions. In order to be of servant of all, for the much more important message of Christ and the gospel, they subdue that.
The same with other things, also. The minister and the preacher and the Christian witness should never be haughty, never be in the old sense of the word ‘bookish’. It has taken on rather a good sense now, the term bookish just means you are studious and diligence and interested and have a passion for books. All that is maybe a good thing, but the term used to have a somewhat negative sense years ago. Somebody who is bookish hasn't got any time for the ordinary, for the common sense, for plain speaking. He is up in another world, and uses only five syllable words if he can. Well, that would immediately cut the preacher off from the generality of people. So if we going to be all things to all men, we have to be very scrupulous and careful about that. It goes for all of us in Christian witness.
Occasionally you will hear a preacher – maybe it is in the open air, where the temptation is greater – who is extremely aggressive and shrill with his proclamation, and that puts people off. Some people love it. It kind of stirs the blood if someone shouts at the top of his voice and is very shrill, but for most people it is the language of aggression, and they dislike it. So as soon as you adopt an extreme style, you cannot be a servant to all, and commend your message to all. You also have to consider, yes, the ignorance of people and explain things repeatedly and carefully; you have to bear with the slowness and the resistance to spiritual things which people have, which we all had before we were converted. We think back to our own years in unbelief and the stubbornness and the obstinacy that we displayed when people tried to talk to us. So we remember ourselves, and we have to have almost infinite patience with others, and be inoffensive and courteous, no matter what.