The regular proceeding of our watch not being the fit measure of time...

The regular proceeding of our watch not being the fit measure of time, but the secret motions of a much more curious engine, our bodies being to limit out the portion of time in this occasion: however, it may be so contrived that all the time may not be lost, for the conversation of an ingenious friend upon what one hath read in the morning, or any other profitable subject, may perhaps let into the mind as much improvement of knowledge, though with less prejudice to the health, as settled solemn poring over books, which we generally call study; which, though a necessary part, yet I am sure is not the only, and perhaps not the best, way of improving the understanding.

Great care is to be taken that our studies encroach not upon our sleep: this I am sure, sleep is the great balsam of life and restorative of nature, and studious sedentary men have more need of it than the active and laborious, because those men's business and their bodily labours, though they waste their spirits, help transpiration, and carry away their excrements, which are the foundation of diseases; whereas the studious sedentary man, employing his spirits within, equally or more wastes them than the other, but without the benefit of transpiration, allowing the matter of disease insensibly to accumulate.

We are to lay by our books and meditations when we find either our heads or stomachs indisposed upon any occasion; study at such time doing great harm to the body, and very little good to the mind. 1st. As the body, so the mind also, gives laws to our studies; I mean, to the duration and continuance of them; let it be never so capacious, never so active, it is not capable of constant labour nor total rest.

The labour of the mind is study, or intention of thought, and when we find it is weary, either in pursuing other men's thoughts, as in reading, or tumbling or tossing its own, as in meditation, it is time to give off and let it recover itself. Sometimes meditation gives a refreshment to the weariness of reading, and vice versâ; sometimes the change of ground, i. e.

going from one subject or science to another, rouses the mind, and fills it with fresh vigour; oftentimes discourse enlivens it when it flags, and puts an end to the weariness without stopping it one jot, but rather forwarding it in its journey; and sometimes it is so tired, that nothing but a perfect relaxation will serve the turn.