La Vita Nuova

At that moment I say truly that the vital spirit, that which lives in the most secret chamber of the heart began to tremble so violently that I felt it fiercely in the least pulsation, and, trembling, it uttered these words: ‘Ecce deus fortior me, qui veniens dominabitur michi: 

Behold a god more powerful than I, who, coming, will rule over me.’ At that moment the animal spirit, that which lives in the high chamber to which all the spirits of the senses carry their perceptions, began to wonder deeply at it, and, speaking especially to the spirit of sight, spoke these words: ‘Apparuit iam beatitudo vestra: Now your blessedness appears.’ At that moment the natural spirit, that which lives in the part where our food is delivered, began to weep, and weeping said these words: ‘Heu miser, quia frequenter impeditus ero deinceps!: Oh misery, since I will often be troubled from now on!’

-Dante

I love how he captures the feeling of love.