Wisdom is a right understanding, a faculty of discerning good from evil; what is to be chosen, and what rejected; a judgment grounded upon the value of things, and not the common opinion of them; an equality of force, and a strength of resolution. It sets a watch over our words and deeds, it takes us up with the contemplation of the works of nature, and makes us invincible by either good or evil fortune. It is large and spacious, and requires a great deal of room to work in; it ransacks heaven and earth; it has for its object things past and to come, transitory and eternal. It examines all the circumstances of time; “what it is, when it began, and how long it will continue: and so for the mind; whence it came; what it is; when it begins; how long it lasts; whether or not it passes from one form to another, or serves only one and wanders when it leaves us; whether it abides in a state of separation, and what the action of it; what use it makes of its liberty; whether or not it retains the memory of things past, and comes to the knowledge of itself.” It is the habit of a perfect mind, and the perfection of humanity, raised as high as Nature can carry it. It differs from _philosophy_, as avarice and money; the one desires, and the other is desired; the one is the effect and the reward of the other. To be wise is the use of wisdom, as seeing is the use of eyes, and well-speaking the use of eloquence. He that is perfectly wise is perfectly happy; nay, the very beginning of wisdom makes life easy to us. Neither is it enough to know this, unless we print it in our minds by daily meditation, and so bring a _good-will_ to a good habit. And we must practice what we preach: for _philosophy_ is not a subject for popular ostentation; nor does it rest in words, but in things. It is not an entertainment taken up for delight, or to give a taste to our leisure; but it fashions the mind, governs our actions, tells us what we are to do, and what not.