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Cf. 17:81 .
I.e., in contrast to the creativeness inherent in every true idea, falsehood - being in itself an illusion - cannot really create anything or revive any values that may have been alive in the past.
The fourth argument is that the Truth is final: it does not come and go: it creates new situations and new developments, and if by chance it seems to be defeated for a time, it comes back and restores the true balance;-unlike Falsehood, which by its very nature is doomed to perish: xvii. 81. The Prophet's credentials are known by the test of Time. This was already becoming apparent to discerning eyes when this Sura was revealed in Makkah, but it became clear to the whole world with the story of Islam's progress in Madinah.