Moreover, we have examples not onely of a Nestor who liv'd three ages; of an Artephius who liv'd as many, and many more; and the Herb Moly, the Nectar and Ambrosia of the Poets, which kept their gods from growing old, may well be taken for a figure of the Tree of Life, which was design'd for separation of this Humidity, but also of compositions proper to produce that effect. Yea, were it not actually so, yet 'tis not less possible; and God hath not in vain promis'd as a Reward to such as honour their Superiors, to prolong their dayes upon the earth.
The Second said, If Medaea found Herbs, as the Poets say, to lengthen the Life of Aeson the Father of Jason, the Daughters of Aelias miscarried of their purpose. Indeed every thing that lives needs Heat for exercising its Actions, and Humidity to sustain that Heat; the duration of this Heat in the Humidity is Life, which lasts as long as the one is maintain'd by the other; like the lighted wiek in a Lamp. Now Nature dispenses to every one from the Birth as much of this Heat and Moisture as she pleases, to one for fifty, to another for sixty, seventy, eighty years or more; which ended, the stock is spent. Physick may husband it well, but cannot produce it anew; Aliments never repair it perfectly, no more then Water doth Wine, which it increases indeed, but weakens too, when mingled there∣with.
The Third back'd this Suffrage with the opinion of Pythagoras, who held that our Life is a strait line; that the accidents which disturb it, and at length bring Death, constitute another; and accordingly (saith he) as these two lines incline less or much towards one another, Life is long or short; because the Angle of their incidence, and at which they cut, which is our Death, happens sooner or later; and it would never happen, if these two lines were parallel. Now the meeting of these two lines can∣not be deferr'd or put off.
The Fourth said, 'Twere a strange thing if Humane Art could repair all other defects of the Body and Mind, excepting that whereof there is most need, and all Ages have complain'd, Brevity of Life. For our Understanding hath much less need of an Art of Reasoning, our tongue of an Art of speaking, our legs of dancing, then our Life of being continu'd, since 'tis the foundation of all the rest. Besides, Physick would seem useless without this. For though it serv'd only to asswage the pains of diseases, (which is a ridiculous opinion) yet it would thereby protract the time of Death, to which pain is the way.
The Fifth said, That for the preservation of Life, 'tis requi∣site to continue the marriage of Heat and moisture, Death al∣wayes hapning immediately upon their disjunction, and leaving the contrary qualities in their room, Cold and Dryness. Now to know how Heat must be preserv'd, we must observe how 'tis destroy'd. And that is four wayes I. By Cold, which being moderate, fights with it; but violent, wholly destroyes it.