Knowledge illuminates, but at the same time it may even create an illusion of illumination.  This often happens if knowledge is not tampered with other virtues like humility, tolerance and nobility.  These are the virtues which can lead from knowledge to wisdom.  The following three quotes are invaluable as they remind us of the limitations of knowledge.

“Knowledge is proud that he has learned so much. Wisdom is humble that he knows no more.” W. Cowper

 “When I knew but little, I was vain of my knowledge. But when I learnt a little more, my vanity vanished like fever.” Bharatrihari

“Jaanaa to yeh jaanaa, ke na jaanaa kuchh bhi.” Zauq. (Translated into English it means, “When I came to know, I knew that I know nothing.”)