Who among the following stated that “True philosopher and the true poet are one, and a beauty. Which is truth, and a truth, which is beauty, is the aim of both?

The correct option is Ralph Waldo Emerson.

This statement reflects the philosophical and aesthetic views of the American Transcendentalist essayist, lecturer, and poet Ralph Waldo Emerson. In his writings, Emerson frequently explored the unity of the human mind, nature, and art. He believed that both the philosopher and the poet seek the same ultimate reality: the intellect seeks truth, while the active imagination seeks beauty. Ultimately, because truth and beauty are different aspects of the same divine unity, the true philosopher and the true poet share the same essential identity and goal.

While John Keats famously wrote the line "Beauty is truth, truth beauty" in his poem Ode on a Grecian Urn, it was Ralph Waldo Emerson who specifically integrated this concept into a definition of the roles of the philosopher and the poet, declaring that "The true philosopher and the true poet are one, and a beauty, which is truth, and a truth, which is beauty, is the aim of both."