"She doesn’t hold back anything from them. When they beg her not to depart, she reminds them that nothing lasts forever. She’s as truthful as the nursery rhymes. Remember that all the King’s horses and all the King’s men couldn’t put Humpty-Dumpty together again. There’s such a tremendous truth in that. It goes into children in some part of them that they don’t know, and indeed perhaps we don’t know. But eventually they realize — and that’s the great truth."

“Mary Poppins herself had flown away, but the gifts she had brought would remain for always..”

“Since 1939, however, there have been no bonfires on the village greens. No fireworks gleam in the blackened parks and the streets are dark and silent. But this darkness will not last forever. There will some day come a Fifth of November — or another date, it doesn't matter — when fires will burn in a chain of brightness from Land's End to John O' Groats. The children will dance and leap about them as they did in the times before. They will take each other by the hand and watch the rockets breaking, and afterwards they will go home singing to the houses full of light...”

“My Zen master, because I’ve studied Zen for a long time, told me that every one of the Mary Poppins stories is in essence a Zen story. And someone else, who is a bit of a Don Juan, told me that every one of the stories is a moment of tremendous sexual passion, because it begins with such tension and then it is reconciled and resolved in a way that is gloriously sensual. … A great friend of mine at the beginning of our friendship said to me very defiantly, “I have to tell you that I loathe children’s books.” And I said to him, “Well, won’t you just read this just for my sake?” And he said grumpily, “Oh, very well, send it to me.” I did, and I got a letter back saying: “Why didn’t you tell me? Mary Poppins with her cool green core of sex has me enthralled forever.”

“When I write it’s more a process of listening. I don’t pretend that there is some spirit standing beside me that tells me things. More and more I’ve become convinced that the great treasure to possess is the unknown. I’m going to write, I hope, a lot about that. It’s with my unknowing that I come to the myths. If I came to them knowing, I would have nothing to learn. But I bring my unknowing, which is a tangible thing, a clear space, something that’s been made room for out of the muddle of ordinary psychic stuff, an empty space.”

“You do not chop off a section of your imaginative substance and make a book specifically for children, for — if you are honest — you have no idea where childhood ends and maturity begins. It is all endless and all one.”

“P L Travers : Why is her creation, Mary Poppins, still so popular?" BBC Interview”