"Have they not travelled through the earth and seen
what was the end of those before them? They were more numerous than
them and mightier in strength, and in the traces (they have left behind
them) in the land, yet all that they used to earn availed them not."
[30:9]
Then Allah mentioned their major sin, saying: "Then when their Messengers came to them with clear proofs",
that is the Divine Books, the mighty miracles and the manifest
beneficial knowledge that distinguished between guidance and
misguidance, between truth and falsehood; "they were glad (and proud) with that which they had of the knowledge (of worldly things)",
meaning, the knowledge that contradicted the knowledge of the
Messengers. It is well known that being glad (and proud) showed their
overwhelming happiness with this knowledge, and that they followed it
firmly, showed enmity to the truth that was brought by the Messengers
and (established) their falsehood as the truth. This applies to all
types of knowledge that are utilized to nullify the knowledge brought by
the Messengers.
The affair that is most deserving of inclusion in
this are the philosophical sciences and Greek philosophy by way of which
many verses of the Qur’an were rejected and its (lofty) status
diminished in hearts of the people, and they held the proofs of this
philosophy – that were only statements – as proofs based on certainty,
even though they do not provide anything that would lead to certainty,
and was preferred by the intellects of the foolish and the adherents to
falsehood. This is one of worst types of denying Allah’s Signs, opposing
and nullifying them. "And that at which they used to mock, surrounded them (i.e. the punishment)." [Tafseer As-Sadi]