Again, he writes, "Will you suggest the subject of an opera? Yes or no? I am in an abyss of doubt. Oh! do not laugh, and say that the disease is incurable; for indeed; the choice of a subject merits all this inquietude and scepticism. It is my lot to be forced to make a choice; and I cannot avoid it; otherwise I should continue to doubt until the day of judgment; and then begin again. Read the third scene of the third act of my 'Adrian;' remark the character which the emperor gives of himself, and you will see my own.[47] From this you may conclude; that I know my faults; but not that I can correct them. This pertinacity in a fault; which torments me without the recompence of any pleasure; and which I clearly perceive; without being able to remedy; makes me often reflect on the tyranny which the body exercises over the mind. If my understanding is convinced, when reasoning calmly, that this excess of indecision is a troublesome, tormenting, and useless vice, and an obstacle to the execution of any design, why do I not get rid of it? Why not abide by a resolution, so often taken, to doubt no more? The answer is clear; that the mechanical constitution of the soul's imperfect habitation gives a false colouring to objects before they reach it, as rays of the sun appear yellow or green or red, according to the hue of the substance which they traverse to meet our eyes. Hence it is clear, that men for the most part do not act from reason, but from mechanical impulse, subsequently adapting, by the force of their understanding, their reason to their actions, so that the cleverest frequently appear the most reasonable. Do not get weary, because I play the philosopher with you; I have none else with whom to play it; and doing it thus by letter, I call to mind conversations of this kind, which made us spend so many happy hours together.--O, how much more matter for such has my experience in the world given me! [Footnote: July 4. 1733.] We will again talk on these subjects, if fortune does not, through some caprice, entangle the thread of my honourable but laborious life." A few months after fortune cut, rather than entangled, the thread of these prospects; Marianna died, and, true to her feelings of friendship[48] to the end, she left the poet heir to her possessions, to the amount of thirty thousand crowns. Metastasio writes thus to his brother, on receiving this sad intelligence:--