I read this in a chapter essay by Craig Bartholomew on Wisdom Literature in the OT.
Brevard Childs was once asked by a student how to become a better exegete of the Bible. “Become a deeper person!” replied Childs.
See “Hearing the OT Wisdom Literature,” in Hearing the Old Testament (Eerdmans), p. 309.
This is something I love about Childs too. Here is another quote of his which you may appreciate: http://narrativeandontology.blogspot.de/2008/10/greatness-of-von-rad.html.