Abstract
The study is divided in the twenty four parts, according to main problems of intangible form of creatures. After the initial words concerning the personality of Rodrigo Arriaga, the study deals with existence and principal attributes of angels as typical representatives of immaterial beings.
The next subjects of the study are the origin of angelic beings, their intellectual and volitional faculties, distinction in nine angelic choirs, possibilities of mutual communication, problems of their location and motion, their activities in the material world, function of guardian angels, origin of demons, their initial sin and fall, the unearthly assembly area of angels and devils. The general purpose of the study consists in rehabilitation of the immaterial sphere regard to material world.
The publication is intended in honour of the best Prague thinker in the past, Rodrigo de Arriaga, too.