All philosophers true to the study will go mad some day.
But then again, it is Normal that defines Mad.

The curve of a smile

"I am enlightened" said the Fool's smile
"I am ignorant" said that of the Wise
"You know nothing" implied the Skeptic's
"I know all" was that of the Vain
"I'm right" was seen of the Pessimist's
"Not always" replied the Optimist's
Looking at this, appeared- a smile
Another; a smirk almost
"I am happy" smiled Innocence.