Paul Valery expresses in his 'A dialogue about trees' 1944:

'The tree and love: in our minds the two can unite to become one idea. Each grows from an imperceptible germ, becomes stronger, expands, branches out; but to the same extent that it reaches skyward (or 'blissward'), it must become rooted in a sphere invisible to us: in our very being.'

These images are in the collection of St. Andrew's Hospital, Northampton. Pinhole Photography.