If you read the entire excerpt you'll see A. W. Pink's assessment of churches and a Christian's connection with them

6. Hatred of the World

We profit from the Word when we evoke the hatred of the world. What pains are taken in the world to save appearances and keep up a seemly and good state! Its conventionalities and civilities, its courtesies and charities, are so many contrivances to give an air of respectability to it. So too its churches and cathedrals, its priests and prelates are needed to gloss over the corruption which seethes beneath the surface. And to make good weight “Christianity” is added, and the holy name of Christ is taken upon the lips of thousands of those who have never taken His “yoke” upon them (Mat 11:29). Of them God says, “This people draweth nigh unto Me with their mouth and honoreth Me with their lips; but their heart is far from Me” (Mat 15:8). And what is to be the attitude of all real Christians toward such? The answer of Scripture is plain: “from such turn away” (2Ti 3:5). “Come out from among them, and be ye separate, saith the Lord” (2Co 6:17). And what will follow when this Divine command is obeyed? Why, then we shall prove the truth of those words of Christ’s: “If ye were of the world, the world would love his own: but because ye are not of the world, but I have chosen you out of the world, therefore the world hateth you” (Joh 15:19). Which “world” is specifically in view here? Let the previous verse answer: “If the world hate you, ye know it hated Me before it hated you.” What “world” hated Christ and hounded Him to death? The religious world, those who pretended to be most zealous for God’s glory. So it is now. Let the Christian turn his back upon a Christ-dishonouring Christendom, and his fiercest foes and most relentless and unscrupulous enemies will be those who claim to be Christians themselves! But “Blessed are ye, when men shall revile you, and persecute you…for My sake. Rejoice, and be exceeding glad” (Mat 5:11,12). Ah, my brother, it is a healthy sign, a sure mark that you are profiting from the Word, when the religious world hates you. But if, on the other hand, you still have a “good standing” in the “churches” or “assemblies” [which are compromised with the world], there is grave reason to fear that you love the praise of men more than that of God! (The bracketed insertion did not appear in the original.)

(From Chp. 7 of Profiting from the Word, by A. W. Pink)