Leopardi says:
Sopra ogni dolore d’ogni sventura si può riposare, fuorchè sopra il pentimento. Nel pentimento non c’è riposo nè pace, e perciò è la maggiore o la più acerba di tutte le disgrazie.
It is incredible to note that, in other words, the same statement is already in these notes: remorse is extremely painful and invincible, acting as an immovable fetter on the spirit, against which nothing can be done. But the curious thing is to note the identical conclusion, reached by different and independent means, which, if it does not express a truth discovered twice, perhaps denotes similar experiences or spirits who react to them in a similar way.