(10) Another precept is to practise all things chiefly at two several times, the one when the mind is best disposed, the other when it is worst disposed; that by the one you may gain a great step, by the other you may work out the knots and stonds of the mind, and make the middle times the more easy and pleasant.

(11) Another precept is that which Aristotle mentioneth by the way, which is to bear ever towards the contrary extreme of that whereunto we are by nature inclined; like unto the rowing against the stream, or making a wand straight by bending him contrary to his natural crookedness.

The Advancement of Learning — Part 123

(12) Another precept is that the mind is brought to anything better, and with more sweetness and happiness, if that whereunto you pretend be not first in the intention, but _tanquam aliud agendo_, because of the natural hatred of the mind against necessity and constraint. Many other axioms there are touching the managing of exercise and custom, which being so conducted doth prove indeed another nature; but, being governed by chance, doth commonly prove but an ape of Nature, and bringeth forth that which is lame and counterfeit.

The Advancement of Learning — Part 123

(13) So if we should handle books and studies, and what influence and operation they have upon manners, are there not divers precepts of great caution and direction appertaining thereunto? Did not one of the fathers in great indignation call poesy _vinum dæmonum_, because it increaseth temptations, perturbations, and vain opinions? Is not the opinion of Aristotle worthy to be regarded, wherein he saith, “That young men are no fit auditors of moral philosophy, because they are not settled from the boiling heat of their affections, nor attempered with time and experience”? And doth it not hereof come, that those excellent books and discourses of the ancient writers (whereby they have persuaded unto virtue most effectually, by representing her in state and majesty, and popular opinions against virtue in their parasites’ coats fit to be scorned and derided), are of so little effect towards honesty of life, because they are not read and revolved by men in their mature and settled years, but confined almost to boys and beginners? But is it not true also, that much less young men are fit auditors of matters of policy, till they have been thoroughly seasoned in religion and morality; lest their judgments be corrupted, and made apt to think that there are no true differences of things, but according to utility and fortune, as the verse describes it, _Prosperum et felix scelus virtus vocatur_; and again, _Ille crucem pretium sceleris tulit_, _hic diadema_: which the poets do speak satirically and in indignation on virtue’s behalf; but books of policy do speak it seriously and positively; for so it pleaseth Machiavel to say, “That if Cæsar had been overthrown, he would have been more odious than ever was Catiline;” as if there had been no difference, but in fortune, between a very fury of lust and blood, and the most excellent spirit (his ambition reserved) of the world? Again, is there not a caution likewise to be given of the doctrines of moralities themselves (some kinds of them), lest they make men too precise, arrogant, incompatible; as Cicero saith of Cato, _In Marco Catone hæc bona quæ videmus divina et egregia_, _ipsius scitote esse propria_; _quæ nonunquam requirimus ea sunt omnia non a natura_, _sed a magistro_? Many other axioms and advices there are touching those proprieties and effects, which studies do infuse and instil into manners. And so, likewise, is there touching the use of all those other points, of company, fame, laws, and the rest, which we recited in the beginning in the doctrine of morality.

The Advancement of Learning — Part 123