Yoko Ono turns 80 today. 80! Nearly 50 of those years ago, she wrote a book called Grapefruit, a kind of how-to manual for would-be artists—and a conceptual work of art unto itself—from which we excerpted the following quotes to live by…

“Let people copy or photograph your paintings. Destroy the originals.”

“Think that snow is falling. Think that snow is falling everywhere all the time. When you talk with a person, think that snow is falling between you and on the person. Stop conversing when you think the person is covered by snow.”

“Imagine the clouds dripping. Dig a hole in your garden to put them in.”

“Imagine one thousand suns in the sky at the same time. Let them shine for one hour. Then, let them gradually melt into the sky. Make one tunafish sandwich and eat.”