50: The four rays of mind are the four minor rays which form the logoic Quaternary and which are synthesised eventually into a fifth ray, the third major ray of active intelligence, or adaptability.  The names of the rays are as follows:
The three major rays:
1. The Ray of Will or Power.
2. The Ray of Love or Wisdom.
3. The Ray of Active Intelligence.
The four minor Rays:
4. The Ray of Beauty, Harmony, Art or Rhythm.
5. The Ray of Concrete Knowledge or Science.
6. The Ray of Abstract Idealism.
7. The Ray of Ceremonial Order or Organisation.