El pensamiento reclama el uso pleno de la razón y el punto de vista personal para comprender la realidad, sin eludir las cuestiones capitales respecto a las cuales el hombre necesita orientarse. Para ello se poseen hoy los métodos adecuados, olvidados y abandonados por la gran mayoría de los que usurpan abusivamente el nombre de filosofía, que hay que tomar en serio y con todo rigor para poseer la vida humana y el horizonte de sus posibilidades.
As one of the most remarkable spanish philosophers on the XX century, he wrote several books about philosofy, politics and social matters. After Spanish civil war, he left Spain with his family because, as oppositor of Franco's dictatorship, he was banned from teaching in the university and he couldn't appear in the media. The Marías traveled to the United States and there he taught at numerous institutions including Harvard University, Yale University, Wellesley College, and UCLA.
Marías wrote on a wide variety of subjects during his long career. A subject of particular interest was Cervantes's Don Quixote. In 1964 he was elected into the Real Academia Española, and he won a Prince of Asturias award in 1996. From 1.977 to 1.979 he was senator in the Spanish General Courts.
He is the father of the famous novelist Javier Marías