Passage
and straightway he called them; and leaving their father Zebedee in the ship with the hired servants, they went away after him.
and straightway he called them; and leaving their father Zebedee in the ship with the hired servants, they went away after him.
Mark 1:18 and straightway leaving their trawl-nets they followed him.
Mark 1:19 And going on thence a little, he saw James the [son] of Zebedee, and John his brother, and these [were] in the ship repairing the trawl-nets;
Mark 1:20 and straightway he called them; and leaving their father Zebedee in the ship with the hired servants, they went away after him.
Mark 1:21 And they go into Capernaum. And straightway on the sabbath he entered into the synagogue and taught.
Mark 1:22 And they were astonished at his doctrine, for he taught them as having authority, and not as the scribes.
The verse centers on "called", "straightway", "leaving", "father", "zebedee", "ship", "hired", and "servants". It is saying that the verse draws attention to "called" and "straightway", so its meaning should be read from those terms before moving to application.
The nearby context moves from verse 19's "And going on thence a little he..." into verse 21's "And they go into Capernaum And straightway...", so "called" and "straightway" 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 "called" and "straightway" with trust shaped by these words, not by a vague optimism outside the passage.