If we are to reach Spiritual Illumination, the triangle must be inverted. The top of the first triangle becomes the bottom of the second. The mind, now on the first level, must change and become regenerated and capable of more abstract thought. It becomes higher mind, imbued with higher ideals. This is the First Degree.
The second level, the heart or desire nature becomes purified and through its lofty desires reaches the point of communion with the Hierarchies. This is the Second Degree.
Finally, on the third level, the fully regenerated or spiritualized mind and heart enable the regeneration of the mortal into the immortal. This is the true self and the Third Degree.