To all this must be added his literary works, first of all those on art, which are landmarks and authorities of the first order for the Renaissance of Form, especially in architecture; then his Latin prose writings - novels and other works - of which some have been taken for productions of antiquity; his elegies, eclogues, and humorous dinner-speeches. He also wrote an Italian treatise on domestic life in four books; and even a funeral oration on his dog. His serious and witty sayings were thought worth collecting, and specimens of them, many columns long, are quoted in his biography. And all that he had and knew he imparted, as rich natures always do, without the least reserve, giving away his chief discoveries for nothing. But the deepest spring of his nature has yet to be spoken of - the sympathetic intensity with which he entered into the whole life around him. At the sight of noble trees and waving cornfields he shed tears; handsome and dignified old men he honored as 'a delight of nature,' and could never look at them enough. Perfectly formed animals won his goodwill as being specially favored by nature; and more than once, when he was ill, the sight of a beautiful landscape cured him. No wonder that those who saw him in this close and mysterious communion with the world ascribed to him the gift of prophecy. He was said to have foretold a bloody catastrophe in the family of Este, the fate of Florence and that of the Popes many years beforehand, and to be able to read in the countenances and the hearts of men. It need not be added that an iron will pervaded and sustained his whole personality; like all the great men of the Renaissance, he said, 'Men can do all things if they will.'
And Leonardo da Vinci was to Alberti as the finisher to the beginner, as the master to the dilettante. Would only that Vasari's work were here supplemented by a description like that of Alberti! The colossal outlines of Leonardo's nature can never be more than dimly and distantly conceived.