From a postmodern perspective, Keegan considers his work as abstraction oscillating between representational and abstract like Expressionists and Surrealists of the early 20th century.  His affinity for transcendentalist painters and his love for mysticism imbue his paintings with metaphysical narratives.   He explores a 'mystical science' through the use of surreal landscapes and materials resembling dew drops and glass vessels that interact with the light rays in diagrammatic compositions.