For if the difference proceeded from the temper of the brain, and the organs of Sense, either exterior or interior, there would be no lesse difference of men in their Sight, Hearing, or other Senses, than in their Fancies, and Discretions.

It proceeds therefore from the Passions; which are different, not onely from the difference of mens complexions; but also from their difference of customes, and education.
The Passions that most of all cause the differences of Wit, are principally, the more or lesse Desire of Power, of Riches, of Knowledge, and of Honour.

All which may be reduced to the first, that is Desire of Power.

For Riches, Knowledge and Honour are but severall sorts of Power.
Giddinesse Madnesse And therefore, a man who has no great Passion for any of these things; but is as men terme it indifferent; though he may be so farre a good man, as to be free from giving offence; yet he cannot possibly have either a great Fancy, or much Judgement.

For the Thoughts, are to the Desires, as Scouts, and Spies, to range abroad, and find the way to the things Desired: All Stedinesse of the minds motion, and all quicknesse of the same, proceeding from thence.