'Let us then speak of _hope_' he says, '_especially_ as we are not vain promisers, nor are willing to enforce or ensnare men's judgments; but would rather lead them _willingly_ forward. And although we shall employ the most cogent means of _enforcing hope when we bring them_ TO PARTICULARS, and _especially_ those which are digested and arranged in our Tables of Invention, the subject partly of the SECOND, but--_principally_--mark it, _principally_ of the FOURTH part of the Instauration, which are, indeed, rather the very objects of our hopes than hope itself.' Does he dare to tell us, in this very connection, that he is _not_ a vain promiser, when no such PART as that to which he refers us here is to be found anywhere among his writings--when this _principal_ part of his promise remains unfulfilled. 'The FOURTH part of the Instauration,' he says again in his formal description of it, 'enters upon philosophy itself, furnishing _examples of inquiry and investigation_, according to our own method, _in certain subjects of the noblest kind_, but greatly differing from each other, that a specimen may be had of _every sort_. By these examples, we mean _not illustrations of rules and precepts_,' [He will show the facts in such order, in such scientific, select, methodical arrangements, that rules and precepts will be forced from them; for he will show them, on the tables of invention, and rules and precepts are the vintage that flows from the illustrious instances--the prerogative instances--the ripe, large, cleared, selected clusters of facts, the subtle prepared history which the tables of invention collect. The definition of the simple original elements of history, the pure definition is the first vintage from these; but 'that which in speculative philosophy corresponds to the cause, in practical philosophy becomes the rule' and _the axiom of practice_, ready for use, is the final result.] 'but perfect models, which will exemplify the SECOND PART of this work, and represent, as it were, to _the eye_ the whole progress of the mind, and _the continued structure and order of invention_ in THE MORE CHOSEN SUBJECTS'--note it, in the _more_ chosen subjects; but this is not at all--'_after the same manner as globes and machines facilitate the more abstruse and subtle demonstrations in mathematics_.' But in another place he tells us, that the poetic form of demonstration is the form to which it is necessary to have recourse on these subjects, _especially_ when we come to these more abstruse and subtle demonstrations, as it opens an easy and familiar passage to the human understanding in all new discoveries, that are abstruse and out of the road of vulgar opinion; and that at the time he was writing out this plan of his works, any one, who would let in new light on the human understanding, and conquer prejudices, without raising animosity, opposition, or disturbance, had no choice--_must go in that same path_, or none.