Libri iii, Caput XIII, (XV.) emendati Johann Heinrich F. Karl Witte (1874)  p. 25. https://www.google.com/books/edition/De_monarchia_libri_iii_emendati_per_C_Wi/_RhcAAAAQAAJ?hl=en&gbpv=1&pg=PA25&printsec=frontcover Translation as quoted by Hannah Arendt, The Human Condition (1958)  p. 175. https://archive.org/details/humancondition0000aren/page/175/mode/1up 
De Monarchia (1312-1313) 
Original: (la) Nam in omni actione principaliter intenditur ab agente, sive necessitate naturae, sive voluntarie agat, propriam similitudinem explicare, unde fit, quod omne agens, in quantum huiusmodi, delectatur; quia, quum omne quod est appetat suum esse, ac in agendo agentis esse quodammodo amplietur, sequiturde necessitate delectatio... Nihil igitur agit, nisi tale existens, quale patiens fieri debet...
                                    
Dante Alighieri: Doing
Dante Alighieri was Italian poet. Explore interesting quotes on doing.
                                        
                                        Canto X, lines 121–129 (tr. Mandelbaum). 
The Divine Comedy (c. 1308–1321), Purgatorio 
Context: O Christians, arrogant, exhausted, wretched,
Whose intellects are sick and cannot see,
Who place your confidence in backward steps,
Do you not know that we are worms and born
To form the angelic butterfly that soars,
Without defenses, to confront His judgment?
Why does your mind presume to flight when you
Are still like the imperfect grub, the worm
Before it has attained its final form?
                                    
                                        
                                        Canto I, lines 88–90 (tr. Ciardi). 
The Divine Comedy (c. 1308–1321), Paradiso
                                    
                                        
                                        Canto VI, lines 43–46 (tr. Carlyle-Wicksteed). 
The Divine Comedy (c. 1308–1321), Purgatorio
                                    
                                        
                                        Canto III, lines 79–84 (tr. Longfellow). 
The Divine Comedy (c. 1308–1321), Purgatorio
                                    
                                
                                    “How long in woman lasts the fire of love,
If eye or touch do not relight it often.”
                                
                                
                                
                                
                            
                                        
                                        Canto VIII, lines 77–78 (tr. Longfellow). 
The Divine Comedy (c. 1308–1321), Purgatorio
                                    
“Time moves and yet we do not notice it.”
                                        
                                        Canto IV, line 9 (tr. Mandelbaum). 
The Divine Comedy (c. 1308–1321), Purgatorio