I will send you out to fish for people. At once they left their nets and followed him

Mark 1:16-20

As Jesus walked beside the Sea of Galilee, he saw Simon and his brother Andrew casting a net into the lake, for they were fishermen. “Come, follow me,” Jesus said, “and I will send you out to fish for people.” At once they left their nets and followed him.

When he had gone a little farther, he saw James son of Zebedee and his brother John in a boat, preparing their nets. Without delay he called them, and they left their father Zebedee in the boat with the hired men and followed him.

Why?

Simon, Andrew, James, and John followed Jesus at once and didn't know the word of the Lord.

It does not need any reason, but trust in Jesus and follow Him. Just as Jesus called them. Followed him, then your will fish for people.

They followed Jesus without delay, usually, we will delay or prepare something, but they reacted soon.

How?

Trust in Jesus and following Jesus is the way to our eternal life.