“…it is a dreadful sin to depart from the church for the purpose of establishing one which is better, for the church is one, being the body of Christ. To separate ourselves from the church is to separate from the people of Christ and thus from His body, thereby withdrawing from the confession of Christ and departing from the fellowship of the saints. If we indeed deem the church to be what she really is, we shall then cause schism in the body of Christ, grieve the godly, offend others, give cause for the blaspheming of God‟s Name, and cause the common church member to err. By maintaining that the church is no church, we thereby deny the church of Christ, and therefore are also guilty of the sins just mentioned. We thereby displease God, who will not leave this unavenged, regardless of how much we please and flatter ourselves. Such activity the apostle opposes when he refers to such individuals as being carnal in 1 Cor 3:1, 3. He warns against this when he writes, “Now I beseech you, brethren, by the name of our Lord Jesus Christ, that ye all speak the same thing, and that there be no divisions among you” (1 Cor 1:10); “I hear that there be divisions among you” (1 Cor 11:18).
Thirdly, the Reformed Church is the only true church, albeit that her purity varies with locality. The truth is still preached purely there, sins are rebuked and resisted, and there is both the teaching of and exhortation to godliness. Thousands of godly persons are to be found there who practice holiness in a much purer fashion than those who have separated themselves. Christ dwells and walks among them. The Holy Spirit is still active by means of the Word, still converts souls daily, comforts the converted, and causes them to grow. Discipline is still exercised towards those who err in doctrine and life. In some localities this is practiced more consistently than people may perceive and be aware of. What foolishness it is, therefore, to leave the church and to enter into a barren wilderness! (pp. 61-62)”
~a. Brakel