1 Corinthians 10:33

The apostle says in a certain place, "If I yet pleased men, I should not be the servant of Christ;" and the same apostle says in another place, "I please all men in all things," and adds the reason, "Not seeking mine own profit, but the profit of many, that they may be saved."... What the apostle says, then, in the first of these passages, "If I yet pleased men, I should not be the servant of Christ," is to be understood as if he said, If the good things which I do were done by me with human praise as my motive, if I were puffed up with the love of praise, I should not be the servant of Christ. The apostle, then, wished to please all men, and rejoiced in pleasing them, not that he might himself be inflated with their praises, but that he being praised might build them up in Christ.

If we reject the repentance of those who have some confidence in a conscience that may be tolerated; at once with their wife, with their children, whom they had kept safe, they are hurried by the devil's invitation into heresy or schism; and it will be attributed to us in the day of judgment, that we have not cared for the wounded sheep, and that on account of a single wounded one we have lost many sound ones.

It was not for his own temporal advantage that he has spoken of the peace of the era to come but for his fellow believers and neighbors, so that they should long for it to gain salvation and chain themselves with the bonds of unanimity.

For the hearts of men are firmly set on evil. And, that we may not give a pretext to those who desire to get a pretext against us and to speak evil of us, and that we may not be a stumbling-block to any one, …

Further, because he had said, "give no occasion of stumbling," and he made them responsible for the injury done, both to the Gentiles and to the Jews; and the saying was grievous; see how he renders it acceptable and light, putting himself forward, and saying, "Even as I also please all men in all things, not seeking mine own profit, but the profit of the many, that they may be saved." "Be ye imitators of me, even as I also am of Christ." This is a rule of the most perfect Christianity, this is a landmark exactly laid down, this is the point that stands highest of all; viz. the seeking those things which are for the common profit: which also Paul himself declared, by adding, "even as I also am of Christ." For nothing can so make a man an imitator of Christ as caring for his neighbors. Nay, though thou shouldest fast, though thou shouldest lie upon the ground, and even strangle thyself, but take no thought for thy neighbor; thou hast wrought nothing great, but still standest far from this Image, while so doing. However, in the case before us, even the very thing itself is naturally useful, viz; the abstaining from idol-sacrifices. But "I," saith he, "have done many of those things which were unprofitable also: e.g., when I used circumcision, when I offered sacrifice; for these, were any one to examine them in themselves, rather destroy those that follow after them and cause them to fall from salvation: nevertheless, I submitted even to these on account of the advantage therefrom: but here is no such thing. For in that case, except there accrue a certain benefit and except they be done for others' sake, then the thing becomes injurious: but in this, though there be none made to stumble, even so ought one to abstain from the things forbidden. But not only to things hurtful have I submitted, but also to things toilsome. […]