Rashi explains that the repetition of the word “years” divides the life of Sarah Imeinu into three periods, each with its own uniqueness. Each period, however, also shares a particular characteristic with its predecessor. Thus, at one hundred, she was as free of sin as a twenty-year old (a person does not suffer Heavenly punishment until age twenty), and at twenty she maintained the innocent, wholesome beauty of a seven-year-old. Rashi concludes, Kulan shavin l’tovah; “All of her years were equal in goodness.” Our Matriarch had a good life, in which each of her superior character traits synchronized with one…