The Gospels record a period of ministry by Jesus *before* he chose the twelve disciples. Here's a summary of what he did:
* Baptism and Temptation: He was baptized by John the Baptist in the Jordan River, after which he went into the wilderness for forty days and was tempted by Satan.
* Early Ministry in Galilee: He began preaching and teaching in the synagogues of Galilee. His message centered on repentance, the arrival of the Kingdom of God, and faith.
* Miracles and Healings: He performed many miracles, healing the sick, casting out demons, and demonstrating his power over nature. These miracles drew large crowds and increased his reputation.
* Gathering Followers: While not yet the "Twelve," Jesus had attracted a growing number of followers who traveled with him and listened to his teachings.
* Call of First Disciples: Before selecting the definitive "Twelve," he called some of his earliest followers, such as Simon (Peter), Andrew, James, and John, to leave their fishing nets and follow him. These individuals would become part of the core group that would later form the Twelve.
In short, before choosing the Twelve, Jesus was actively establishing his ministry, proclaiming his message, demonstrating his power, and gathering a circle of early followers who would eventually become his closest disciples.