1 Timothy 3:15 but if I am delayed, I write so that you may know how you ought to conduct yourself in the house of God, which is the church of the living God, the pillar and ground of the truth.

This verse reminds us that we should be careful with our behavior in church because the church is the house of GOD and church is the place (mostly) where the word of GOD is preached. Church is the pillar and ground of the truth and we, as church members should conduct our behavior according to the truth.