Who said "Loneliness is the only honest relationship with truth."?

This quote is attributed to Fernando Pessoa.

Loneliness is the only honest relationship with truth. - Fernando Pessoa

"Loneliness is the only honest relationship with truth."

Fernando Pessoa Solitude

Poet Portuguese 1888–1935

"I am not I; I am this one walking beside me whom I do not see."

"To be great, be whole; exclude nothing, exaggerate nothing that is not you."

"The worst prison people live in is the fear of what other people think."

"I love without knowing how, or what, or even if I exist."

"Sometimes being the best means being the loneliest."

"Solitude gives us time to reflect on what matters"

"I'm not good with people, never have been."

"I feel like I'm disappearing."