Passage
And it shall be that whosoever shall call upon the name of Jehovah shall be saved: for in mount Zion and in Jerusalem shall be deliverance, as Jehovah hath said, and for the residue whom Jehovah shall call.
And it shall be that whosoever shall call upon the name of Jehovah shall be saved: for in mount Zion and in Jerusalem shall be deliverance, as Jehovah hath said, and for the residue whom Jehovah shall call.
Joel 2:30 And I will shew wonders in the heavens and on the earth, blood, and fire, and pillars of smoke.
Joel 2:31 The sun shall be changed to darkness, and the moon to blood, before the great and terrible day of Jehovah come.
Joel 2:32 And it shall be that whosoever shall call upon the name of Jehovah shall be saved: for in mount Zion and in Jerusalem shall be deliverance, as Jehovah hath said, and for the residue whom Jehovah shall call.
The verse centers on "saved", "shall", "whosoever", "call", "upon", "name", and "jehovah". It is saying that the verse draws attention to "saved" and "shall", so its meaning should be read from those terms before moving to application.
The prior verse says "The sun shall be changed to darkness...", giving immediate footing for "saved" and "shall". In Joel context, the local focus is covenant, worship, and faithfulness.
A plain takeaway is to answer the verse's own emphasis on "saved" and "shall" with trust shaped by these words, not by a vague optimism outside the passage.