Born at Rancon, in the Haute-Vienne department, Forest was professor of philosophy, after secondary studies at the Lycée de Poitiers. He participated in World War I (1917–1918). He graduated in philosophy at the age of twenty-three in 1921, after uninterrupted studies at the Faculty of Letters of Bordeaux. Appointed in 1921 professor of philosophy at the Lycée de Guéret, he remained there until 1925. From 1925 to 1936, he was professor of philosophy at the Lycée de Poitiers.
In 1931, he presented his thesis The Metaphysical Structure of the Concrete according to Saint Thomas Aquinas to the Faculty of Letters of the University of Paris. From 1936 to 1937, he was Professor of Philosophy at the Lycée Rollin in Paris, then from 1937 to 1940 Professor of Philosophy at the Lycée Condorcet in Paris. In 1940, he was appointed to higher education, lecturer at the Faculty of Letters of Grenoble in the chair of Jacques Chevalier, then in 1941, he was Associate Professor at the Faculty of Letters of Grenoble, a post he held until 1943. In 1943, he was appointed professor of philosophy at the Faculty of Letters and Human Sciences of Montpellier until his retirement in 1968.
Forest's work includes not only books but also a large number of articles. His philosophy, of Thomist influence, flourished in philosophy of the mind. Forest was particularly attentive to French spiritualist philosophy (Lavelle, Le Senne, Madinier, Gabriel Marcel, Chevalier, etc). He participated in the joint work group of Jacques Chevalier (1920–1940), the only philosopher of Thomist origin among its members. Two of Mr. Forest's children died in the Oradour-sur-Glane massacre.
He is the author of an important article to understand what reflective philosophy has been: "Role and nature of reflection" in Consent and creation (1943).
He was also correspondent of the Academy of Moral and Political Sciences from 1967 to 1983 in the section of philosophy.
Aimé Forest died in Limoges.
- Du Consentement à l'Être (1936)
- Consentement et Création (1943)
- Quelques Aspects de l'Humanisme Médiéval (1943)
- La Résurrection de la France par la Famille (1945)
- La Vocation de l'Esprit (1953)
- La Structure Métaphysique du Concret selon Saint Thomas d'Aquin (1956)
- Pascal ou l'Intériorité Révélante (1971)
- L'Avènement de l'Âme (1973)
- Essai sur les Formes du Lien Spirituel (1981)
- Nos Promesses Encloses (1985)
- Masset, Pierre (1989). L'Intériorité Retrouvée: La Philosophie Spirituelle d'Aimé Forest. Paris: Pierre Téqui.
- Mahé, Michel (1999). Christianisme et Philosophie chez Aimé Forest: La Philosophie Spirituelle d'Aimé Forest. Paris: Pierre Téqui.
- Mahé, Michel (2004). Aimé Forest et «une sagesse plus haute que le thomisme». Paris: Pierre Téqui.