The authors my grandfather quotes are- in order: Horace Gregory, Cervantes, the un-named author of a Life of Hazlitt, Goethe, the prophet Micah, and D.T. Suzuki, author of Living Zen.
I inherited my grandfather's copy of Living Zen. It's a book that means a lot to me. The last quotation in the pigskin book is a favourite of mine too- one I try to keep in mind whenever the world gets particularly shouty- as it is doing at the moment- what with the US election and all: "Cease to cherish opinions."