There is a pleasure in being mad which none but madmen know. John Dryden
There are worse things than being mad. Jack Kerouac
Most men are within a finger's breadth of being mad. Diogenes of Sinope
Women who are inclined to write poetry at all are inspired by being mad at something. Amy Clampitt
The Deftmenes are mad and the Dumii are sane, thought Snibril, and that's just the same as being mad except that it's quieter. If only you could mix them together, you'd end up with normal people. Terry Pratchett
I'm very much afraid of being mad - that's my one fear. Sting (musician)