The essence of Paul’s message in 2 Corinthians 4:18 is to focus on the eternal, unseen realities of heaven helps us endure the temporary hardships of earthly life. Paul’s contrast between the seen (temporary) and the unseen (eternal) is a key theme in his letters, encouraging believers to maintain hope and persevere through trials by keeping their eyes fixed on the future glory that awaits them. His point is not that we should disregard earthly life, but rather that we should live it in light of eternity, recognizing that our true and lasting home is in heaven.