Here he borrows, of course, largely from the ancients; at the same time he treats us to some observations on human nature sufficiently original to keep his work from the dryness of plagiarism.
His treatise on "A Solitary Life" was written as an apology for his own love of retirement--retirement, not solitude, for Petrarch had the social feeling too strongly in his nature to desire a perfect hermitage.
He loved to have a friend now and then beside him, to whom he might say how sweet is solitude.

Even his deepest retirement in the "shut-up valley" was occasionally visited by dear friends, with whom his discourse was so interesting that they wandered in the woods so long and so far, that the servant could not find them to announce that their dinner was ready.

In his rapturous praise of living alone, our poet, therefore, says more than he sincerely meant; he liked retirement, to be sure, but then it was with somebody within reach of him, like the young lady in Miss Porter's novel, who was fond of solitude, and walked much in Hyde Park by herself, with her footman behind her.
His treatise, "De Otio Religiosorum," was written in 1353, after an agreeable visit to his brother, who was a monk.

It is a commendation of the monastic life.

He may be found, I dare say, to exaggerate the blessing of that mode of life which, in proportion to our increasing activity and intelligence, has sunk in the estimation of Protestant society, so that we compare the whole monkish fraternity with the drones in a hive, an ignavum pecus, whom the other bees are right in expelling.
Though I shall never pretend to be the translator of Petrarch, I recoil not, after writing his Life, from giving a sincere account of the impression which his poetry produces on my mind.