“He was ready to let himself be permeated by a thought and to experience it by living it, with sympathy, in order to seize it. Then he sometimes reversed it, turning it into something rich and strong, to quote Shakespeare. If I think of a disconcerting and miraculous intelligence, capable of absorbing even superstitions, even astrology or magic, of transforming them into an original treasure, I think of Eugenio Colorni”.
Guido Morpurgo-Tagliabue, “Ricordo di Colorni”, Arethusa, July-August, 1945.

Eugenio “abhors from a federation for economic and power purposes, combined by the diplomacies of the states. Instead he sees a federation in terms of a socialist movement, that is born from the peoples. And that is therefore revolutionary (as Eugenio abhors from combined marriages, or unions without love, where we tend to exploit, and reduce to ourselves, the different)”.
Luisa Villani Usellini, “Appunto rapidissimo”, undated.

“Sartre, Levi-Strauss, Foucault are maitre à penser. Eugenio was really the opposite: a constant critic, inquiring, stimulator. That he was at the same time homme d'action and penseur critique was perhaps his special feature…”
Undated letter by Albert Hirschman to Ursula Hirschmann Spinelli (early ‘70s).

“The thought of Colorni was a glowing magma of prodigious genius that would have invested every area to which his intellectual interests had turned”.
Leo Solari, May 18, 2004.

“I remember Angelo, this great scientist, this great scholar, this great freedom fighter also as a man exceptionally good in political activities, in propaganda and in the teaching that he, even slightly older than us, gave us”.
Giuliano Vassalli, May 18, 2004