“The lover is moved by the beloved object as the senses are by sensual objects; and they unite and become one and the same thing. The work is the first thing born of this union; if the thing loved is base the lover becomes base.”

(Cambridge: 2002), Book 9, Chapter 2, Section 2, p. 26
On the Trinity (417)

Source: The Sayings and Teachings of the Great Mystics of Islam (2004), p. 270

I-II, q. 28, art. 5
Summa Theologica (1265–1274)
Context: it is to be observed that four proximate effects may be ascribed to love: viz. melting, enjoyment, languor, and fervor. Of these the first is "melting," which is opposed to freezing. For things that are frozen, are closely bound together, so as to be hard to pierce. But it belongs to love that the appetite is fitted to receive the good which is loved, inasmuch as the object loved is in the lover... Consequently the freezing or hardening of the heart is a disposition incompatible with love: while melting denotes a softening of the heart, whereby the heart shows itself to be ready for the entrance of the beloved.

Lyric poetry, Não pode tirar-me as esperanças, Transforma-se o amador na cousa amada

Source: Summa Theologica (1265–1274) I-II, q. 28, art. 2

De visione Dei (On The Vision of God) (1453)

Penser, c'est voir! me dit-il un jour emporté par une de nos objections sur le principe de notre organisation. Toute science humaine repose sur la déduction, qui est une vision lente par laquelle on descend de la cause à l'effet, par laquelle on remonte de l'effet à la cause; ou, dans une plus large expression, toute poésie comme toute oeuvre d'art procède d'une rapide vision des choses.
Honoré de Balzac, Louis Lambert http://fr.wikisource.org/wiki/Louis_Lambert (1832), translated by Clara Bell

Charlie Rose interview (2001)