54. Injury is done to the Word of God when, in the same sermon, an equal or larger amount of time is devoted to indulgences than to the Word.
Martin Luther is making the point here that when the sermon is more about selling indulgences than speaking the Word of God to the people, then the Word is dishonored. The Word can bring the people salvation, peace and joy. Indulgences give none of those things; they only give a false sense of security.
Even today people can be swayed to trust in something or someone other than the Word of God for their salvation. Our human nature would rather trust in something that we can see or touch. Therefore we trust in our own actions (our good works) rather than the work of Jesus for our salvation.
Everything that we need can be found in the Word of God. He speaks to us by His Holy Spirit through His Word. So that Word should be all that we preach to God’s people. We are reminded that it is the Holy Spirit that brings us a saving faith in Jesus, we cannot get it on our own or by ourselves.
Dear Father in Heaven please send Your Holy Spirit into my life today that I may rest in Your power and know for certain of Your salvation for me. In Christ I pray, Amen.