174. External things of the body, that are of worship, are: 1. Regularly attending places of worship; 2. Listening to sermons; 3. Singing devoutly, and partaking of the saying prayers kneeling; 4. Sacrament of the Supper. Then at home: 1. Saying prayers morning and evening, also at dinners and suppers; 2. Talking with other people about charity and faith, and about God, heaven, eternal life, and salvation; 3. Also, in the case of priests, preaching, as well as teaching privately; 4. And for everyone, instructing children and servants in such matters; 5. Reading the Word, and books of instruction and piety.