Pastor's prayer before Divine Service

O Lord God, dear Father in heaven, I am indeed unworthy of the office and ministry in which I am to make known Your glory and to nurture and to serve this congregation. 

But since You have appointed me to be a pastor and teacher, and the people are in need of the teaching and the instruction, be my helper and let Your holy angels attend me. 

Then if You are pleased to accomplish anything through me, to Your glory and not to mine or to the praise of men, grant me, out of Your pure grace and mercy, a right understanding of Your Word and that I may diligently perform it. 

O Lord Jesus Christ, Son of the living God, shepherd and bishop of our souls, send Your Holy Spirit that He may work with me to will and to do through Your divine strength according to Your good pleasure.  Amen.  (Lutheran Service Book:  Pastoral Care Companion - Luther's Sacristy Prayer, p. xviii)