43. Is it then a matter of indifference to what church we belong?

No; it is our solemn duty to understand the character and signs of a true church of Christ — and to adhere to that church which is found most consonant to the scriptures, in its doctrines, its ordinances, and its constitution.

Thomas Smyth, An Ecclesiastical Catechism of the Presbyterian Church; For the Use of Families, Bible-Classes, and Private Members, 26.