A sound mind in a sound body, is a short, but full description of a happy state in this World: he that has these two, has little more to wish for; and he that wants either of them, will be little the better for anything else.
John LockeSet the mind to work, and apply the thoughts vigorously to the business, for it holds in the struggles of the mind, as in those of war, that to think we shall conquer is to conquer.
John LockeA man may live long, and die at last in ignorance of many truths, which his mind was capable of knowing, and that with certainty.
John LockeThere cannot be greater rudeness than to interrupt another in the current of his discourse.
John Locke