Former President Jimmy Carter has entered hospice care at age 98, after undergoing treatment for liver cancer in 2015.
Whatever you may think of his presidency (and history is treating him more kindly than his contemporaries did) this is a truly good man, a mensch. In in my opinion he is a tzaddik, a righteous human in the biblical/moral meaning.
When his light is gone, it will be incumbent on us to work a little harder to keep the world lit.