'Our sweetest songs are those that tell of saddest thought' was quoted by________

• P. B. Shelley is a famous Romantic poet.• His famous quotations:- Our sweetest songs are those that tell of saddest thought.- The more we study, the more we discover our ignorance.- Fear not the future, weep not for the past.- If Winter comes can spring be far behind?- Poets are the unacknowledged legislators of the world.Source: Encyclopedia of Britannica and Website Lecture.