Can we quote the wicked?

In many ways, the book of Job is a drama, with roles written for the good guys and the bad guys. Job is righteous and Eliphaz and Bildad and Zophar are not (see chapter 42). On the other hand, most of what the three advisors say throughout the book is actually pretty good advice.

Let no one deceive himself. If anyone among you seems to be wise in this age, let him become a fool that he may become wise. For the wisdom of this world is foolishness with God. For it is written, “He catches the wise in their own craftiness…” (1 Corinthians 3:18-19)

Paul is quoting Eliphaz, who is in context reprimanding Job. I’ve wondered about the wisdom of quoting what seems like good advice coming from the mouth of a wicked man, but it looks like Paul is doing just that. And if it’s good enough for Paul, it’s good enough for me.

Perhaps this could be a case for reading and studying pagan classics like the Iliad?