Tag Archives: kashrut

Drawing Lines in the Data – Earth Day / Shemini 5777

Last Monday, the 7th day of Pesah, Beth Shalom member Chris Hall spoke during morning services about the relationship between science and religion, and one element that he presented is that they answer different questions. In my mind, there is no conflict between science and religion because while science might tell us how the world works, it does not attempt to answer, “Why?” That is for the theologians.

We might be tempted to dismiss the Torah’s story of Creation because it conflicts with the story that current scientific opinion tells us. But I think it is essential for us to consider what we learn from both. While astrophysicists have determined that the universe is about 14 billion years old, and that the after-effects of the Big Bang can still be measured to this day, we learn nothing from this about our responsibility for the world we have received. That we can learn from the book of Bereshit / Genesis. What is our relationship to the Earth, says Bereshit? Le’ovdah ulshomerah. “To till it and to tend it.” (Gen. 2:15)

Now granted, we haven’t read that parashah since October, so I am not going to dwell on it today. But something that does appear in Parashat Shemini is a list of things we are permitted to eat and not eat. And there is a lesson to be drawn from that as well.

But first, a little science.

Today, you may know, is not only Kylie’s bat mitzvah. It is also Earth Day, the annual, global awareness-raising event that brings people together around the world to remember the obligations of Genesis. To that end, I would just like to share a few items with you:

  1. 2016 was the hottest year on record, the third straight year in a row of record-setting temperatures since record-keeping began in the 1880s. https://www.nytimes.com/2017/01/18/science/earth-highest-temperature-record.html
  2. This past February, the average global temperature was 1.76 degrees Fahrenheit above the average for the 20th century. That may not sound like a lot, but in climatology terms, it’s huge. https://www.usatoday.com/story/weather/2017/03/17/globe-second-warmest-winter-on-record/99303812/
  3. The great plume of plastics that continues to grow in the Pacific Ocean is now flowing northward into the Arctic Ocean. https://www.nytimes.com/2017/04/19/climate/arctic-plastics-pollution.html?hp&action=click&pgtype=Homepage&clickSource=story-heading&module=photo-spot-region&region=top-news&WT.nav=top-news

I could cite numerous other such bits of data: how much oil we consume each day, how much food we throw away, how much carbon dioxide enters the atmosphere per hamburger eaten, and so forth. But what does it mean to us? How might we regard that information and take action? What might our Jewish tradition teach us about our responsibilities vis-a-vis Creation?

On this Earth Day, let us turn to kashrut, the principles of holy eating, for answers.

What does the word “kasher” (accent on the second syllable) mean? Fitting, appropriate. (“Kosher” is the Yiddish/Ashkenazi pronunciation.) The word does not appear in the Torah at all, but in rabbinic literature is used to denote anything that may be used for a holy purpose, not just food. What makes something kasher? That it is legally permissible under Jewish law to eat it or use it for ritual purposes.

In Parashat Shemini, we read a list of animals that are appropriate to eat. Some are identified by certain categories – the split-hoofed ruminants, like cows and deer and sheep – and some are named specifically, mostly the birds. The Torah does not tell us why these are allowed and not camels or shrimp or alligators. All we know, at least from the parashah, is that God does not want us to eat those other things, which are called “tamei” (impure) or “sheqetz(literally, an abomination; this is the Hebrew origin of the Yiddish slur sheygetz / shiktza, and why one should never use these terms).

It is curious that the Torah provides no rationale. Did the authors want us not to ask why? Was the answer known to the ancients, and so obvious that it did not need to be stated? Perhaps this “why” is left dangling for us to discover ledor vador, in each generation according to what is relevant in its time.

Or maybe it is that the only reasoning we might be able to glean from this passage is that, well, some things are in and some things are out. That when God gave Creation to us, to till and to tend, that there were simply some natural limits to our behavior. That not all things are available to us. That while we are permitted to take advantage of some things, others are off limits. That we must leave some parts of Creation untilled and untended.

Perhaps, as Midrash Tanhuma (Parashat Shemini, #7) suggests, the goal of kashrut is to teach us mindful consumption:

“The mitzvot [of kashrut] were given solely in order to train people. For what does it matter to the Qadosh Barukh Hu / God about the ‘purity’ or ‘impurity’ of the animals we eat?”

Perhaps we might learn from this that the drawing of boundaries in the natural world should lead to our ethical behavior in other spheres: in our relationships with others, in our relationships with ourselves, in our relationships with the animal realm. Perhaps the drawing of lines in what we consume as individuals will lead us to draw lines in how we as a society consume our resources, to determine where our limits are as we continue to advance as a civilization.

Where are our lines?

How will we know when we have crossed them? When the Arctic ice is gone? When the giant, swirling heap of plastic currently in the Pacific Ocean has filled the Chesapeake Bay? When the bumblebees are gone?

I recall a curious incident in a rabbinical school theology class. Most of my classmates were not science people; they had degrees in literature, or history, or Judaic studies. I know you may find this hard to believe, but I was somewhat unusual in that I had two degrees in chemical engineering. I do not recall the apropos, but the subject of science vs. God came up, and I said that our understanding of God changes, but science does not. Several of my classmates jumped on this, saying, “But science does change.”

Actually, no. As with God, our understanding of science changes. As we move forward, we learn more about the world that we have been given, and so we adjust our understanding, our theories and formulas, to reflect the data that we collect. But science and God do not change. Their nature and secrets are revealed to us as human civilization matures. Just as God continues to be revealed to us, so does science.

The principles of physics and chemistry and thermodynamics and math that govern how our world works are immutable. And they will neither teach us about faith nor answer the hard questions that we face every day.

But our tradition teaches us to act. And act we must. We must till, we must tend, and we must draw lines. We do not have free reign to use and abuse Creation.  With God-given power comes God-given responsibility.

My personal rabbi on the subject of our responsibility to Creation is the author Theodore Seuss Geisel, best known as Dr. Seuss. In what I consider to be his finest work, The Lorax, Dr. Seuss reminded us of our responsibility vis-a-vis the Earth. The Lorax, after failing to prevent the destruction of a piece of unspoiled land, a beautiful, holy gift of plants and animals and scenery, takes his leave from an altar labeled “Unless.”


We can make personal, individual choices to reduce our own energy footprint. We can use LED light bulbs and compost our kitchen scraps and recycle our plastic and even buy electric cars. We can draw many personal lines in our own behavior.

But unless we as a society make some collective decisions for change on a grand scale, nothing will change. Unless we draw some lines, we will continue to monitor and watch and take data that give us no answers.

The time to act is now.



Rabbi Seth Adelson

(Originally delivered at Congregation Beth Shalom, Shabbat morning, 4/22/17.)



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