Each year, on Yom Kippur, fast days, and the days leading up to the High Holy Days, Jews recite the Thirteen Midot. For many, this is the high point of the Selihot service. Yet few know why they recite the Thirteen Midot, what the tradition has to say about them, or why they seem to hold hidden power. In In His Mercy, a leading Israeli scholar offers an insightful introduction and concise essay on each Mida to bring new meaning to your tefillot.