Tonight and tomorrow is the Jewish holiday of Yom Kippur, the Day of Atonement, which (for otherwise healthy people) is marked most prominently by approximately 25 hours of complete fasting.
So, for those of you who are fasting, have an easy, safe fast.
If you're ill, were recently ill, are very elderly, are pregnant, you recently gave birth, or you have certain chronic health conditions like cardiac arrhythmias, a seizure disorder, or low blood pressure, etc., you probably are forbidden by Jewish law from fasting.
To determine if you are barred from fasting, ask a doctor who knows your health condition well. If s/he says don't fast, if possible, tell your rabbi and he'll rule that you must eat and drink.
If it isn't possible to ask a doctor or a rabbi, err on the side of caution and protect your health.
In honor of Yom Kippur, there will be no new posts until tomorrow night about an hour (or so) after sundown.