The sense of unhappiness is so much easier to convey than that of happiness. In misery we seem aware of our own existence, even though it may be in the form of a monstrous egotism: this pain of mine is individual, this nerve that winces belongs to me and to no other. But happiness annihilates us: we lose our identity. The words of human love have been used by the saints to describe their vision of God, and so, I suppose, we might use the terms of prayer, meditation, contemplation to explain the intensity of the love we feel for a woman. We too surrender memory, intellect, intelligence, and we too experience the deprivation, the noche oscura, and sometimes as a reward a kind of peace. The act of love itself has been described as the little death, and lovers sometimes experience too the little peace. 

~Graham Greene, The End of the Affair