What is a Pure Church?

Question: What, then, do you mean by a pure church?-

By a pure church, or portion of the visible church, I mean a society whose confession of faith agrees with the doctrine of Jesus Christ and his apostles; and which is governed solely by the laws laid down in the word of God, or drawn from it by plain and necessary inference.

Question: What, then are the signs of a pure church?

The signs of a pure church are soundness of doctrine, a lawful and regular ministry, the prevalence of love among its members and towards all saints, and the due administration of gospel ordinances, including discipline.

Scripture Proofs:
 

Eph. 2:20. And are built upon the foundation of the apostles and prophets, Jesus Christ himself being the chief corner-stone.

Acts 2:42. And they continued steadfastly in the apostles' doctrine and fellowship, and in breaking- of bread, and in prayers.

Acts 14: 38. And when they had ordained them elders in every church, and had prayed with fasting, they commended them to the Lord, on whom they believed.

Matt. 28:19. Go ye, therefore,and teach all nations, baptizing them in the name of the Father, and of the Son, and of the Holy Ghost. See also Acts 20 : 7.

(Excerpted from Ecclesiastical Catechism by Dr. Thomas Smyth,1843,  pp.15-16.)