The document discusses what constitutes a valid baptism according to the Bible. It outlines three essentials: 1) immersion as the mode of baptism, not sprinkling or pouring, 2) the subject must be a believer who repents and confesses faith, not an infant, and 3) the purpose must be for salvation and forgiveness of sins, not for other reasons like joining a church. Many who claim to be baptized have not actually been baptized biblically if their baptism did not include all three of these essential elements.