How do we know losing one's soul is a foolish loss?

Losing one's soul is considered a foolish loss because it reflects a misguided valuation of what is truly important. The pursuit of momentary pleasures or earthly ambitions pales in comparison to the eternal weight of the soul's condition. In the light of eternity, trading one's immortal joy for fleeting worldly gains is sheer madness, as illustrated in the stark realities laid out in the Scriptures. The folly lies in exchanging the eternal glory of heaven for perishing trifles, a mistake that leads many astray.