Here are two from Coleridge. From a letter:
My dear fellow! never be ashamed of scheming! -- you can't think of living less than 4,000 years, and that would nearly suffice for your present schemes. To be sure, if they go on in the same ratio to the performance, then a small difficulty arises; but never mind! look on the bright side always and die in a dream!
And from a journal:
The common end of all narrative, nay, of all, poems is to convert a series into a whole: to make those events, which in real or imagined History, move in a strait Line, assume to our Understandings a circular motion -- the snake with it's tail in it's mouth.