[1] In 1965, after graduating the philological faculty at the Moscow University,[2] Belza joined the Gorky Institute of the world literature at the Russian Academy of Sciences.

Among his notable works are "Bryusov and Dante" (Dante and the Slavs anthology, 1965), "Bryusov and Poland" (1966), "Don Quixote in Russian Poetry" (1969), "The Polish Connections of Pyotr Vyazemsky" (Polish-Russian Literary Relations anthology, 1970), "Graham Greene" (English Literature, 1945–1980, 1987), "Pushkin and the Slavic Nations Cultural Unity" (1988), "Dante e la poesia russa nel primo quarto del XX secolo" (from Dantismo russo e cornice europea, Firenze, 1989), "Rozanov and his Readership" (Vasilij Rozanov.

[2] One of the foremost experts on Shakespeare in Russia, Belza compiled and edited the legacy of another important Russian Shakespearean scholar, Mikhail Morozov.

[1] He provided forewords and prefaces for more than 100 publications of works by William Shakespeare, Oscar Wilde, Alexandre Dumas, Honoré de Balzac, Jules Verne, Graham Greene, C. P. Snow, Edgar Allan Poe, Jan Parandowski, Stanisław Lem, Sławomir Mrożek, Teodor Parnicki, and Jarosław Iwaszkiewicz, among others.

[2] In 1987, Belza debuted on the Soviet television as a reviewer; a year later he became the presenter of his own programme, Music on Air (Muzyka v efire, 1988–1996).

After the divorce in 1981, Belza's partner was Olga Glebova, also teacher of English, and daughter of the actor Pyotr Glebov.