21, 22. (a) Why should we attend the annual observance of the Lord's Evening Meal? (b) What will be explained in Chapters 6 and 7?
21, 22. (a) Kungani kumele sibekhona embuthanweni weSidlo seNkosi Sakusihlwa owenziwa minyaka yonke? (b) Kuyini okuzachasiswa eZahlukweni 6 lo-7?