Nor is it always best for man to will
Ev’n what his pow’rs can reach; some latent ill
Beneath a fair appearance may delude
And make him rue what earnest he pursued.
Then, Reader, as you scan this simple page,
Let this one care your ev’ry thought engage,
(With self-esteem and gen’ral love ’t is fraught,)
Wish only pow’r to do just what you ought.
The course of study which Leonardo had thus undertaken, would, in its most limited extent by any one who should attempt it at this time, be found perhaps almost more than could be successfully accomplished; but yet his curiosity and unbounded thirst for information, induced him rather to enlarge than contract his plan. Accordingly we find, that to the study of geometry, sculpture, anatomy, he added those of architecture, mechanics, optics, hydrostatics, astronomy, and Nature in general, in all her operations[i18]; and the result of his observations and experiments, which were intended not only for present use, but as the basis and foundation of future discoveries, he determined, as he proceeded, to commit to writing. At what time he began these his collections, of which we shall have occasion to speak more particularly hereafter, is no where mentioned; but it is with certainty known, that by the month of April 1490, he had already completely filled two folio volumes[i19].
Notwithstanding Leonardo’s propensity and application to study, he was not inattentive to the graces of external accomplishments; he was very skilful in the management of an horse, rode gracefully, and when he afterwards arrived to a state of affluence, took particular pleasure in appearing in public well mounted and handsomely accoutred. He possessed great dexterity in the use of arms: for mien and grace he might contend with any gentleman of his time: his person was remarkably handsome, his behaviour so perfectly polite, and his conversation so charming, that his company was coveted by all who knew him; but the avocations to which this last circumstance subjected him, are one reason why so many of his works remain unfinished [i20].