Every why hath a wherefore.—Shakespeare.
When I was young? Ah, woeful When!
Ah! for the change 'twixt Now and Then!
—Coleridge.
(2) Certain word groups used like single nouns:—
Too swift arrives as tardy as too slow.—Shakespeare.
Then comes the "Why, sir!" and the "What then, sir?" and the "No, sir!" and the "You don't see your way through the question, sir!"—Macaulay
(3) Any part of speech may be considered merely as a word, without reference to its function in the sentence; also titles of books are treated as simple nouns.
The it, at the beginning, is ambiguous, whether it mean the sun or the cold.—Dr BLAIR
In this definition, is the word "just," or "legal," finally to stand?—Ruskin.
There was also a book of Defoe's called an "Essay on Projects," and another of Dr. Mather's called "Essays to do Good."—B. FRANKLIN.