Passage
And immediately leaving their nets, they followed him.
And immediately leaving their nets, they followed him.
Mark 1:16 And passing by the sea of Galilee, he saw Simon and Andrew his brother, casting nets into the sea for they were fishermen.
Mark 1:17 And Jesus said to them: Come after me; and I will make you to become fishers of men.
Mark 1:18 And immediately leaving their nets, they followed him.
Mark 1:19 And going on from thence a little farther, he saw James the son of Zebedee and John his brother, who also were mending their nets in the ship:
Mark 1:20 And forthwith he called them. And leaving their father Zebedee in the ship with his hired men, they followed him.
The verse centers on "immediately", "leaving", "nets", and "followed". It is saying that the verse draws attention to "immediately" and "leaving", so its meaning should be read from those terms before moving to application.
The nearby context moves from verse 17's "And Jesus said to them Come after..." into verse 19's "And going on from thence a little...", so "immediately" and "leaving" belong inside that flow. In Mark context, the local focus is Christ, faith, and discipleship.
A plain takeaway is to answer the verse's own emphasis on "immediately" and "leaving" with trust shaped by these words, not by a vague optimism outside the passage.