Honorio Delgado Espinosa (26 September 1892 - 28 November 1969) was a Peruvian teacher, creative researcher, humanist, philosopher, linguist, and scholar.

Born in Arequipa, Peru, Delgado graduated from Lima's School of Psychology at the National University of San Marcos.

He contributed to biological developments in the treatment of psychiatric disorders by the use of sodium nucleate in the management of psychotic agitation in 1917 and the use of phenobarbital for the control of seizures in 1919.

He authored more than 450 articles and two dozen books on topics such as personality and character, the rehumanization of scientific culture, the spiritual formation of the individual, and ecology and existentialism.

He also anticipated the crucial role of attention and cognition in the phenomenology of schizophrenia, a process that he called atelesis, or the failure in the intentionality of thought (1).