In the midst of being persecuted by the political authorities, Eugene remains optimistic because of his faith in God. He reflects to his friend and confidant, Fr Tempier:
So you have the advantage of enjoying the pleasure of surprise when, contrary to your expectation, things go better than you thought they would. It makes up for the distress felt by one who has gloomy moods like that. People who see the world through rose-coloured spectacles escape that distress but by the same token they have a less-lively sense of the well-being they take for granted; on the other hand if a person like that suffers a let-down, although he would not escape scot-free, he is not floored by the falling of the blow in question, from which my conclusion would definitely be that a tendency to optimism rather than to gloom best assures peace and tranquillity of soul.
Letter to Henri Tempier, 17 October 1833, EO VIII n 468