“So we do not lose heart. Though our outer self is wasting away, our inner self is being renewed day by day. For this light momentary affliction is preparing for us an eternal weight of glory beyond all comparison, as we look not to the things that are seen but to the things that are unseen. For the things that are seen are transient, but the things that are unseen are eternal.” – 2 Corinthians 4:16-18
Note the contrast between what is: outer, wasting away, light, momentary, affliction, seen, transient.
And what is: inner, being renewed, eternal, weighty, glorious, beyond all comparison, unseen, eternal
Both are part of us, but one matters infinitely more than the other. Don’t confuse the two, or you may lose heart.