I like Einstein's definition of common sense: Common sense is the collection of prejudices acquired by age eighteen."

And Descartes: "Common sense is the most fairly distributed thing in the world, for each one thinks he is so well-endowed with it that even those who are hardest to satisfy in all other matters are not in the habit of desiring more of it than they already have."

Jodie Foster: “Normal is not something to aspire to, it's something to get away from.”

“When will you understand that being normal isn't necessarily a virtue? It rather denotes a lack of courage.” ~Unknown