The mongrels who have disdained the first form of the ignorance of letters, and have not been able to attain to the other (sitting betwixt two stools, as I and a great many more of us do), are dangerous, foolish, and importunate; these are they that trouble the world. And therefore it is that I, for my own part, retreat as much as I can towards the first and natural station, whence I so vainly attempted to advance.