'Sexual desire in particular is notoriously difficult to interpret; the biblical story of Ammon and Tamar (cf. 1 Sam 13) is just one of many ancient warnings of how obscure its tendency might be. It is characteristically surrounded by fantasy, and fantasies are never literal indicators of what the desire is really all about, but are symbolic revealer-concealers of an otherwise inarticulate sense of need. But the point holds also for many kinds of desire - let us say, the desire for a quiet retirement to a cottage in the countryside, or the desire to own a faster racecar. We cannot take any of them at their face value. "It wasn't what I really wanted!" is the familiar complaint of a disappointed literalism. To all desire its appropriate self-questioning: what what wider, broader good does this desire serve? How does it spring out of our strengths, and how does it spring out of our weaknesses? Where in relation to this desire does true fulfillment lie?'
Oliver O'Donovan, A Conversation Waiting to Begin: the churches and the gay controversy, p.112.