The Devil, it is true, is not exactly a doctor who has taken degrees, but he is very learned, very expert for all that. He has not been carrying on his business during thousands of years for nothing.
Martin LutherI [i.e., God] have given you baptism as a gift for the forgiveness of sins, and preach to you unceasingly by word of mouth concerning this treasure, sealing it with the Sacrament of my body and blood, so that you need never doubt. True, it seems little and insignificant that by the washing of water, the Word, and the Sacrament this should all be effected. But don't let your eyes deceive you.
Martin LutherThe purpose of marriage is not to have pleasure and to be idle but to procreate and bring up children, to support a household. This, of course, is a huge burden full of great cares and toils. But you have been created by God to be a husband or a wife and that you may learn to bear these troubles.
Martin Luther