We mustn't fear to adopt the advanced management methods applied in capitalist countries (...) The very essence of socialism is the liberation and development of the productive systems (...) Socialism and market economy are not incompatible (...) We should be concerned about right-wing deviations, but most of all, we must be concerned about left-wing deviations.

Cited by António Caeiro in Pela China Dentro (translated), Dom Quixote, Lisboa, 2004. ISBN 972-20-2696-8