John Chrysostom
The mighty shall be severed (And their strength shall be like a withered stalk). The initial analogies depict unattractiveness, while this one illustrates frailty; they are all easily understood and carry a potent message. Like the stalk of Aesguberia, they signify weakness. Their actions resemble sparks of fire. This indicates that evil lies within them; they are responsible for their own captivity, having kindled the flames. Just as fallen sparks ignite a blaze, their collective transgressions have provoked God's anger. They will be consumed together, and no one will extinguish them (And the lawless and the sinners shall be burned together, and there shall be no quenching).
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Once more, He warns them about losing their salvation for this very reason—not to lead them to despair but to instill a genuine fear and encourage them to abandon their profound indifference. He also highlights His unstoppable might; when He enacts punishment and retribution, none can withstand or halt the ensuing destruction.