You might with advantage take out your map of modern literature and mark on it the name of Italo Svevo…for Svevo and his novel, Confessions of Zeno…w… - Italo Svevo

Svevo’s Zeno, with his complicated relationship with psychoanalysis, is an unforgettable embodiment of the situation of the 20th century humans who have been persuaded by ideologies that they should not listen to [the moral compass of] conscience.
They may believe they are very modern and sophisticated, but in the end they are not able to impose order on the chaos of consciousness and their lives end up in moral bankruptcy.
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Zeno lives in an era of turmoil, and ultimately does not succeed in recovering his conscience. However, he has his opportunities to understand that, notwithstanding what the psychoanalyst tells him, only [the moral compass of] conscience can impose the needed order to what is otherwise a chaotic flow of disconnected pieces of consciousness. These opportunities come when he is confronted with suffering and the world’s injustice, although neither he nor the other main characters in the novel profit of them.

Era dispostissimo ad istruirmi, ed anzi annotò di propria mano nel mio libretto tre comandamenti ch'egli riteneva bastassero per far prosperare qualunque ditta: 1. Non occorre saper lavorare, ma chi non sa far lavorare gli altri perisce. 2. Non c'è che un solo grande rimorso, quello di non aver saputo fare il proprio interesse. 3. In affari la teoria è utilissima, ma è adoperabile solo quando l'affare è stato liquidato.

He was more than willing to instruct me, and in my notebook he actually wrote in his own hand the three commandments he considered sufficient to make any firm prosper: 1. There’s no need for a man to know how to work, but if he doesn't know how to make others work, he is doomed. (2) There is only one great regret: not having acted in one's own best interest. (3) In business, theory is useful, but it can be utilized only after the deal has been made.