I don't believe Wilde said that. This is boomer self-actualization language, and the underlying concept of authenticity is a 20th century creation.

Here is something Wilde really wrote: "Man is least himself when he talks in his own person. Give him a mask, and he will tell you the truth."

http://books.google.com/books?id=xZlRfVy0LbcC&lpg=PA1002...