Verse 13
The Nightcommer • makkah
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Commentary:
This and the preceding verse signify that rain on which depends very largely the greenness and vegetation of the earth comes down from heaven in times of need. If it ceases for a time, the water in upper strata of the earth gradually dries up. Thus there exists a connection between heavenly and earthly water. As with the cessation of heavenly water, earthly water begins gradually to dry up, so does human reason lose its purity and strength without heavenly revelation.
This and the preceding verse mean that just as the rain on which depends very largely the greenness and vegetation of the earth comes down from heaven and with its cessation earthly water begins gradually to dry up, similarly human reason loses its purity and strength without heavenly revelation.