I found this way back when on Jeff Myers old Corrigenda blog. Jeff has now moved to here, and if you click on the link don't bother asking me how to pronounce the name of his new blog.
Still, this is a good little creed for bloggers - I know it is true of me.
I am the sort of man who writes because he has made progress, and who makes progress by writing. - Augustine, Epistle 143.2-3