'Illustrations' in the Bible

Now I have applied these things [that is, the analogies about factions] to myself and Apollos for your benefit, believers, so that you may learn from us not to go beyond what is written [in Scripture], so that none of you will become arrogant and boast in favor of one [minister or teacher] against the other.

Am I making use of merely worldly illustrations? Does not the Law speak in the same tone?