None of the people who would read John's letter had ever met Jesus. Like us, they relied on the ministry of the apostles who had met the risen Jesus and been instructed by Him. Their message brought eternal life to everyone who confessed their sins and trusted that the blood of Jesus Christ purified them from all sin (1 John 1:7-9). The apostles learned it from Jesus and the Holy Spirit taught them how to explain it to others; in turn, they taught this gospel and many were born again, and churches formed to worship Jesus Christ, through whom they knew Father God.