If you tremble with indignation at every injustice, then you are a comrade of mine.
Letter to María Rosario Guevara, 20 February 1964.
In Spanish: "Si usted es capaz de temblar de indignación cada vez que se comete una injusticia en el mundo, somos compañeros, que es lo más importante."
Variant translation: If you are able to tremble with indignation each time an injustice is committed in the world, then we are comrades.
Earliest report in Spanish found in: El Che Guevara (Paidós, 1968), p. 399.
Earliest report in English found in Mayibuye, Volume 2, Issues 26-41 (1968), p. 2: In the immortal words of Comrade 'Che' Guevara, "We tremble With indignation." Also in: Tricontinental, Issues 109-128 (1987), p. 61
https://www.google.com/books/edition/Che_Edici%C3%...[google.com]
