Who said "To witness suffering is to be forever changed by it."?

This quote is attributed to Nellie Campobello.

To witness suffering is to be forever changed by it. - Nellie Campobello

"To witness suffering is to be forever changed by it."

Nellie Campobello

Novelist Mexican 1900–1986

"I am my own woman, and I will not be silenced."

"Memory is the bridge between what was and what could be."

"Revolution begins in the heart before it reaches the streets."

"To know oneself is to begin the journey of change."