[Christ's] mission and work it is to help against sin and death, to justify and bring life. He has placed his help in baptism and the Sacrament [i.e., communion/Eucharist/Lord's supper], and incorporated it in the Word and preaching. To our eyes Baptism [capitalized in original] appears to be nothing more than ordinary water, and the Sacrament of Christ's body and blood simple bread and wine, like other bread and wine, and the sermon, hot air from a man's mouth. But we must not trust what our eyes see.
Martin LutherWhat do we older folks live for if not for the care of the young, to teach and train them?
Martin LutherBut know that to serve God is nothing else than to serve your neighbor and do good to him in love, be it a child, wife, servant, enemy, friend....If you do not find yourself among the needy and the poor, where the Gospel shows us Christ, then you may know that your faith is not right, and that you have not yet tasted of Christ's benevolence and work for you.
Martin Luther