There are many subconscious experiences in the human soul. There are depths of the human soul life that do not become concepts, mental pictures, acts of volition, at least not conscious ones, but only in the character of the human soul life. There is a subconscious soul life; and everything is there that can be in the conscious soul life. However, emotions, passions, sympathies and antipathies which we feel in the usual life consciously can also be in the subconscious regions, they are not perceived in it, but have an effect in the soul like a natural force, — save that they are mental and not physical. There is a whole region of the subconscious soul life.
The human being asserts, believes, and means many things not because he is completely aware of their premises; but he believes and means them from the subconscious soul life because unconscious emotions, inclinations urge him.
Source: Rudolf Steiner – GA 63 – Spiritual Science as a Treasure for Life: Lecture II: Theosophy and Antisophy – Berlin, 6 November 1913
Portrait Steiner by Sunny West