Unless you are very careful, this Campaining, Tempestuous Life you are engaged in, the Liberties of your Court, your own Lazyness, and the Flattery of your Subjects, will constantly be doing you Disservice, wear out the noble Impressions of Philosophy, and make your Study of Nature Insignificant. How then are you to manage upon all Occasions ? In such a manner, as to omit neither Business nor Thinking. To be modest in the Consciousness of your Improvement, but not so far as to undervalue your Knowledge, and keep it out of Sight. When you are thus well-skill'd both in Theory, and Practice, then your Virtues will Regale you, and you'l relish the Advantage of Philosophy. Then you'l be able to understand the Bottom of every Thing; To pronounce upon its Nature, the Ingredients, 'twas made of, and the Weight it has in the World; To calculate its Continuance, who are likely to be affected with it, and what Powers they are which can both give, and take it away.