In the old covenant, the emphasis was always on the external "because of the hardness of men's hearts" (Matt. 19:8). The law emphasised cleanliness in the external. The new covenant, in contrast, emphasised cleanliness "inside the cup" first (Matt. 23:25,26). Jesus said in that verse (v. 26) that once the inside was cleansed, the outside would automatically become clean so that there would be no need to clean the outside at all. One can see this clearly from Matt. 5:21-30. If one has cleansed his heart from anger, there would be no danger of his committing murder externally. Likewise, if he has cleansed his heart from sexually dirty thoughts, there would be no danger of his committing adultery externally. Clean the inside of the cup and the outside will automatically become clean.
Where the emphasis in a church is primarily on the externals - avoiding cinema going, smoking, drinking, gambling and wearing ornaments etc., - such a church will only become an old-covenant church! The way to get rid of external evils is not by concentrating on them first but rather on the internal worldly attitude of mind which produces those external evils.
There can be no inward cleansing without self-judgment. It is impossible to build the church unless this inward cleansing is constantly preached. The Bible tells us to exhort one another daily in the church to avoid being hardened by the deceitfulness of sin (Heb. 3:13; 10:25).
Most Christian 'churches' have no interest in such preaching, except perhaps occasionally. Certainly not daily!. Hence they breed Pharisees with cups clean on the outside only. Here the bride of Christ must be different.