A quote from the book strikes a particular cord with me, I think it's because my girlfriend is reminding me all the time how little I feel, and I look back knowing that she feels far too much:

"Our empathy means we can never hide from what we feel, and that's good. But you must always walk the balance, Syrinx; the balance is the penalty of being human: the danger of allowing yourself to feel. For this we walk a narrow path high above rocky ground. on one side we have the descent into animalism, on the other a godhead delusion. Both pulling at us, both tempting. But without these forces tugging at your psyche, stirring it into conflict, you can never love. They awaken us, you see, these warring sides, they arouse our passion."