Language drives Johnson's art since her illness, as depicted in her piece called Enthusiastic, created in 2009.

Courtesy of Walters Art Museum hide caption

itoggle caption Courtesy of Walters Art Museum

Derrick Bell, the first tenured black professor at Harvard Law School, died of cancer Wednesday. He is seen here in 2002.

Graham Jepson/AP hide caption

itoggle caption Graham Jepson/AP