Wisdom and learning come by asking questions. If we are not curious or courageous enough to ask questions, then we will never learn anything new. Smart people are not necessarily more intelligent than any one else, they merely ask a lot questions because they are curious.
Leaving the comment of the person I pinned this from, cause it's awesome. "I was thinking about this quote today. I really do believe that every person is brilliant in some way. You just have to get out there and try things. Not everyone has to be a scientist or mathematician, but it's important to have a thirst for knowledge and to want to be great at something. Have ambition, don't sell yourself short."