Faithfulness is one acid test of love. When Katey, my first wife, required the support of external care as multiple sclerosis developed, I well remember being advised by a social worker that it would be quite understandable if I couldn’t cope and chose to walk away from my marriage. I told her that, whilst I had little experience of my capacity as a carer, I’d made commitments before God, family and friends at my wedding that meant I didn’t enjoy the freedom to walk away.