Sabbath a'Brakel: The Commission of the Minsiter of the Word

He who is convinced of his divine commission must then also view himself as an ambassador of the Lord Jesus. As such, and with that authority, he must perform all his work, such as preaching, catechizing, the administration of the sacraments, visitation, and the use of the keys of God's kingdom. This will make him bold and faithful, and he and his work will receive more approbation. In this manner all ministers must conduct themselves concerning their commission (II: 127).