"there may be sin in the knowledge of certain truths, in so far as the desire of such knowledge is not directed in due manner to the knowledge of the sovereign truth, wherein supreme happiness consists."

"potest esse vitium in cognitione aliquorum verorum, secundum quod talis appetitus non debito modo ordinatur ad cognitionem summae veritatis, in qua consistit summa felicitas."

     Thomas Aquinas, Summa theologiae II-II.167.1.ad 1.
     I was reminded of this by Gregory Pine, O.P., "This post might kill you:  blogs and curiosity," First things, 3 June 2014.