Therefore, when we could no longer endure our separation [from you], we thought it best to be left behind, alone at Athens,

So whoever rejects and disregards this is not [merely] rejecting man but the God who gives His Holy Spirit to you [to dwell in you and empower you to overcome temptation].

Therefore comfort and encourage one another with these words [concerning our reunion with believers who have died].

But since we [believers] belong to the day, let us be sober, having put on the breastplate of faith and love, and as a helmet, the hope and confident assurance of salvation.

Therefore encourage and comfort one another and build up one another, just as you are doing.