From Professor Pless…
"Let the words of my mouth and the meditation of my heart be acceptable in Your sight, O Lord, my strength and my redeemer." Psalm l9:14
"We refuse to be guided by those who are offended by our church customs. We adhere to them all the more firmly when someone wants to cause us to have a guilty conscience on account of them... It is truly distressing that many of our fellow Christians find the differences between Lutheranism and Papism in outward things. It is a pity and dreadful cowardice when one sacrifices the good ancient church customs to please the deluded American sects, lest they accuse us of being papistic! Indeed! Am I to be afraid of a Methodist, who perverts the saving Word, or be ashamed in the matter of my good cause, and not rather rejoice that the sects can tell by our ceremonies that I do not belong to them?.... We are not insisting that there be uniformity of perception or feeling or of taste among all believing Christians--neither dare anyone that all be minded as he. Nevertheless it remains true that the Lutheran liturgy distinguishes Lutheran worship from the worship of other churches to such an extent that the houses of worship of the latter look like lecture halls in which hearers are merely addressed or instructed, while our churches are in truth houses of prayer in which Christians serve the great God publicly before the world. "
It is for good reason that the Constitution of the Lutheran Church-Missouri Synod follows Walther in making it a condition for membership in the Synod the "Exclusive use of doctrinally pure agenda, hymnbooks, and catechisms in church and school." 
Saying back to him what he has said to us, we repeat what is most true and sure. Most true and sure is his name, which he put upon us with the water of Baptism. We are his. This we acknowledge at the beginning of the Divine Service. Where his name is, there is he. Before him we acknowledge that we are sinners, and we plead for forgiveness. His forgiveness is given us, and we, freed and forgiven, acclaim him as our great and gracious God as we apply to ourselves the words he has used to make himself known to us.