When we fulfill these conditions God will come, and when He comes He will help us fight and gain victory. This is the secret of gaining victory. We don't have much power or strength, but when God is with us we can fight a good fight and win. So what we have to do is prepare the circumstances for God to be able to be with us. All members must do this, but especially the leaders.
Leaders are special members of our church.
God can only further His providence by speaking His word. The Bible says that God created man through the word. So recreation must also proceed through His word. God needs His mouthpieces, i.e. leaders. A minister keeps that place and gives a sermon every Sunday.