Willis Barnstone is an American poet, religious scholar, and translator. He was born in Lewiston, Maine and lives in Oakland, California. He has translated works by Jorge Luis Borges, Antonio Machado, Rainer Maria Rilke, Pedro Salinas, Pablo Neruda, and Wang Wei, as well as the New Testament and fragments by Sappho and pre-Socratic philosopher Heraclitus (Ἡράκλειτος).

Antonio Cipriano José María y Francisco de Santa Ana Machado y Ruiz, known as Antonio Machado, was a Spanish poet and one of the leading figures of the Spanish literary movement known as the Generation of '98. His work, initially modernist, evolved towards an intimate form of symbolism with romantic traits. He gradually developed a style characterised by both an engagement with humanity on one side and an almost Taoist contemplation of existence on the other, a synthesis that according to Machado echoed the most ancient popular wisdom. In Gerardo Diego's words, Machado "spoke in verse and lived in poetry."