It is important to direct our intelligence with good intentions. Without intelligence, we cannot accomplish very much. Without good intentions, the way we exercise of our intelligence may have destructive results.
We study health, and we deliberate upon our meats and drink and air and exercises, and we hew and we polish every stone that goes to that building; and so our health is a long and regular work. But in a minute a cannon batters all, overthrows all, demolishes all; a sickness unprevented for all our diligence, unsuspected for all our curiosity, nay, undeserved, if we consider only disorder, summons us, seizes us, possesses us, destroys us in an instant.
Every one should be his own physician. We ought to assist, and not to force nature. Eat with moderation...Nothing is good for the body but what we can digest. What medicine can procure digestion? Exercise. What will recruit strength? Sleep.