Link to Luther's Rogate Sermon - Five Requirements for True Prayer
A SERMON ON PRAYER.
1. First we note that in order for a prayer to be really right and to be heard five things are required. The first is, that we have from God his promise or his permission to speak to him, and that we remember the same before we pray and remind God of it, thereby encouraging ourselves to pray in a calm and confident frame of mind. Had God not told us to pray, and pledged himself to hear us, none of his creatures could ever, with all their prayers, obtain so much as a grain of corn. From this, then, there follows that no one receives anything from God by virtue of his own merit or that of his prayer. His answer comes by virtue of the divine goodness alone, which precedes every prayer and desire, which moves us, through his gracious promise and call, to pray and to desire, in order that we may learn how much he cares for us, and how he is more ready to give than we are to receive. He would have us seek to become bold, to pray in a calm and confident spirit, since he offers all, and even more, than we are able to ask.