Boggs' name trended nationally on Twitter Monday afternoon as people shared quotes and photos.
People also shared their grief over Boggs' passing by tweeting what Boggs taught them through her work and her life. "What has #GraceLeeBoggs taught you?" tweeted Gregory Cendana, chair of the National Council of Asian Pacific Americans.
Boggs recently marked her 100th birthday at the Charles H. Wright Museum of African American History, surrounded by social justice activists and supporters who celebrated Boggs' mentorship and legacy. "We try to heed Grace's challenge to us," Julia Putnam, principal of the James and Grace Lee Boggs School, told NBC News in June. "She said that we must 'think beyond what we even believe is possible.' This call for critical thinking and deep imagination is her legacy to us."