In this week’s parasha, Va’etchanan, we read the famous words: v’nishmartem me’od l’nafshotechem, “Guard your souls very much…” (Deuteronomy 4:15). The plain meaning of the passage within which these words are found is to be careful not to descend into idolatry, nor to make any sculptures or images of any figures that might be idolatrous. However, since ancient times the phrase to “guard your souls very much” has also been used to mean that it is our obligation to stay healthy and in good physical shape. If the body is not healthy and dies, then the soul will depart it. Having a healthy soul therefore requires maintaining a healthy body, and a pure soul requires a pure bodily vessel.

Interestingly, it was the great Hillel who first pointed out the connection between the prohibition of idolatry and the mitzvah of taking care of one’s body. The Midrash (Vayikra Rabbah 34:3) recounts how Hillel once took leave of his students and they asked him where he was going, to which he replied: “To do a mitzvah!” They asked which mitzvah, and he replied that he was going to the bathhouse. The puzzled students questioned him: is taking a bath a mitzvah? Hillel replied affirmatively, and explained: if all the statues and icons erected in public places needed to be constantly washed, and they are nothing but man-made objects depicting flesh-and-blood kings and nonsensical idols, how much more so must we keep our bodies clean since we were made in the image of God? And this is the deeper meaning behind King Solomon’s words gomel nafsho ish chassed (Proverbs 11:17), that a kindly or pious man makes sure to take care of his soul.

Our Sages had much to say about maintaining good health. For instance, in Gittin 70a, we are taught that there are 8 things that are healthy in small quantities, but harmful in excess. These eight are: travel, sexual intercourse, wealth, labour, wine, sleep, baths, and bloodletting. When it comes to the latter, in those days bloodletting was a popular therapy and it was thought that draining out some “old” blood will stimulate the production of new, healthier blood. There may be something to this, with recent research showing that bloodletting may indeed have been beneficial, and was possibly even effective against bacterial infections. Today, bloodletting is no longer done, but there may be a way to reap the same benefits (and do a double-mitzvah) by going to donate blood. Continue reading →