Jane Wilson-Howarth said this quote

We found a smooth inviting boulder under a vast banyan tree, and sat in companionable silence. There unexpectedly, on that rock, I saw the secret of contentment. True happiness is only ever possible if you have been unhappy. And there, at that moment, I couldn’t remember the last time I had felt so peaceful. It wouldn’t have been possible for me to take in any more happiness. Moti turned to me and smiled as if she knew. I realised then that this moment and this wonderful feeling would sustain me for a long, long time.