According to 2 Corinthians 4:18, what is seen is temporary, but what is unseen is what?

Answer: Eternal

"We fix our eyes not on what is seen, but on what is unseen. For what is seen is temporary, but what is unseen is eternal."

“So we fix our eyes not on what is seen, but on what is unseen. For what is seen is temporary, but what is unseen is eternal.”— 2 Corinthians 4:18 (BSB)