Let us imagine something that we have never known either through perception, or by likeness, analogy of nature, or relationship with any other thing we have perceived. What we are imagining is altogether unknown to us. But its existence is then revealed to us. We begin to know something about it, without however knowing anything of its essence. In a word, we know that something unknown to us exists.
What else could we know about this thing without at the same time knowing its essence? We could know all the infinite relationships it can have with things known to us.
When we speak of God, we are talking of one who has relationships with real things, with feelings, and with ideas, the three activities we have previously distinguished.
[Antonio Rosmini, Certainty, Cleary & Watson, trs., Rosmini House (Durham: 1991), pp. 135-136, sect. 1239. 'Feelings' is Cleary & Watson's translation for what would usually be translated as 'sensations', presumably because it includes internal as well as external sensations.]