Power of the Tongue - Proverbs 18:21

Satan's goal is to divide the children of God. 
Speaking of division and troubles within the body of the church is only giving power to the problem. Let your tongues speak of life, not negative issues. Don't let the fruit of your tongue be destructive. The consequences of speaking negatively within the church body about each other can and will fracture the family of God. 

Let's speak of unity and faith, two issues of life.
Yes, speak of the unity within your church body. Speak of the faith within your church body. Speak words of unity and faith. Pick out the good in your brothers and sisters and speak of that good. Give power to the good. Let the fruit of your tongue be constructive, not destructive. 

The children of God are a world-wide family.
We are not separate sections of the family of God, contained within many church bodies. No, we are one, world wide body of Christ. If we focus on speaking only of unity and faith, can you imagine the effectiveness of our spiritual battle against Satan on a world-wide scale?

Ephesians 4:4-6
There is one body, and one Spirit, even as you are called in one hope of your calling; One Lord, one faith, one baptism, One God and Father of all, who is above all, and through all, and in you all.
John 17:21
That they all may be one; as you, Father, are in me, and I in you, that they also may be one in us: that the world may believe that you have sent me.
Galatians 3:28
There is neither Jew nor Greek, there is neither bond nor free, there is neither male nor female: for you are all one in Christ Jesus.