If you tremble with indignation at every injustice, then you are a comrade of mine.
Variant: If you are able to tremble with indignation each time an injustice is committed in the world, then we are comrades
Earliest attribution 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
