Faith is a living, daring confidence in God's grace, so sure and certain that a man would stake his life on it one thousand times. This confidence in God's grace and knowledge of it makes men glad and bold and happy in dealing with God and with all creatures; and this is the work of the Holy Ghost in faith.
Martin LutherThe heart overflows with gladness, and leaps and dances for the joy it has found in God. In this experience the Holy Spirit is active, and has taught us in the flash of a moment the deep secret of joy. You will have as much joy and laughter in life as you have faith in God.
Martin LutherAs for the demented, I hold it certain that all beings deprived of reason are thus afflicted only by the Devil.
Martin Luther