John Gill discusses the various types of proselytes in the Jewish tradition, emphasizing their different statuses and the conditions under which they were accepted into the Jewish community. He categorizes them into three main types: proselytes of the gate, mercenary proselytes, and proselytes of righteousness, each with distinct obligations and privileges. The sermon highlights the significance of baptism for proselytes of righteousness, who fully embraced the Jewish faith and laws. Gill also reflects on the historical context and the evolving attitudes towards proselytes within the Jewish community. Ultimately, he underscores the importance of sincerity in one's faith journey and the acceptance of those who genuinely seek to follow God's commandments.