This task is laid on the shoulders of all professing Christians. A _silent_ abstinence is not enough. No doubt, the best way, in some circumstances, to convict the darkness is to shine. Our holiness will convict sin of its ugliness. Our light will reveal the gloom. The presentation of a Christian life is the Christian man's mightiest weapon in his conflict with the world's evil. But that is not all. And if Christian people think that they have done all their duty, in regard to clamant and common iniquities, by simply abstaining from them and presenting a nobler example, they have yet to learn one very important chapter of their duty. A dumb Church is a dying Church, and it ought to be; for Christ has sent us here in order, amongst other things, that we may bring Christian principles to bear upon the actions of the community; and not be afraid to speak when we are called upon by conscience to do so. Now I am not going to dwell upon this matter, but I want just to point out to you how, in the context here, there are two or three very important principles glanced at which bear upon it. And one of them is this, that one reason for speaking out is the very fact that the evils are so evil that a man is ashamed to speak about them. Did you ever notice this context, in which the Apostle, in the next verse to my text, gives the reason for his commandment to 'reprove' thus--'_For_ it is a shame even to speak of those things which are done of them in secret'? Did you ever hear of a fantastic tenderness for morality so very sensitive that it is not at all shocked when the immoral things are _done_, but glows with virtuous indignation when a Christian man speaks out about them? There are plenty of people nowadays who tell us that it is 'indelicate' and 'indecent' and 'improper,' and I do not know how much else, for a Christian teacher or minister to say a word about certain moral scandals. But they do not say anything about the immorality and the indelicacy and the indecency of doing them. Let us have done with that hypocrisy, brethren. I am arguing for no disregard for proprieties; I want all fitting reticence observed, and I do not wish indiscriminate rebukes to be flung at foul things; but it is too much to require that, by reason of the very inky cloud of filth that they fling up like cuttlefish, they should escape censure. Let us remember Paul's exhortation, and reprove _because_ the things are too bad to be spoken about. Further, note in the context the thought that the conviction of the darkness comes from the flashing upon it of the light. 'All things when they are reproved are made manifest by the light.' Which, being translated into other words, is this:--Be strong in your brave protest, because it only needs that the thing should be seen as it is, and called by its right name, in order to be condemned.