That Day will not come unless:

1) Falling away comes first

2) Man of sin is revealed the son of perdition

Falling away - apŏstasia - (apostasy, rejection) - Defection from the truth, abandonment, rebellion, defiance of authority, act in complete opposition to its demands.

Gather together - ĕpisunagō - Collect; come together to a particular location; assemble

Caught up - harpazō - To snatch away, remove hastily

Latin - rapturo

Wise - sâkal - Have insight, gain wisdom, understanding, instruct

Shine - zâhar - Be prominent, have a high status, to enlighten or shine a light

Turn to righteousness - tsâdaq - To lead someone to be righteous, speak the truth, be upright, to obtain one's cause