Jeanette Winterson said this quote

When I say 'I will be true to you' I am drawing a quiet space beyond the reach of other desires. No-one can legislate love; it cannot be given orders or cajoled into service. Love belongs to itself, deaf to pleading and unmoved by violence. Love is not something you can negotiate. Love is the one thing stronger than desire and the only proper reason to resist temptation....When I say 'I will be true to you' I must mean it in spite of the formalities, instead of the formalities.