It is common for those that are farthest from God to boast themselves most of their being near to the Church.
The way to preserve the peace of the church is to preserve its purity.
Discernment is God's call to intercession never to faultfinding.
Even if you're improvising the fact that beforehand you know certain things will work helps you make those improvisations successful. It really helps to have a certain amount of knowledge about musical structure.