Overall meaning : The matter is not as the unbelieving idolaters imagine regarding the number of the Fire keepers! I swear by the moon, by the night when it retreats and by the morning when it brightly dawns that the Fire is one of the greatest and unparalleled matters; it is a warning to mankind, to whomever desires to go forward with faith by heeding the warning and be guided to the truth or remain behind by rejecting faith and ignoring the warning.