Mark 1:18
And at once they left their nets and followed Him.
What it says
They leave their nets at once and follow him without delay or argument in response.
What it is doing
It shows immediate obedience to the call of Jesus there.
In context
16As Jesus was walking beside the Sea of Galilee, He saw Simon and his brother Andrew. They were casting a net into the sea, for they were fishermen. 17“Come, follow Me,” Jesus said, “and I will make you fishers of men.” 18And at once they left their nets and followed Him. 19Going on a little farther, He saw James son of Zebedee and his brother John. They were in a boat, mending their nets. 20Immediately Jesus called them, and they left their father Zebedee in the boat with the hired men and followed Him.