The fourth body is the Neutral (Meditative) Mind. This is the third mental body. The Neutral Mind receives input from both the Positive and Negative Minds, and then chooses the best option based on unbiased intuition. The Neutral Mind is characterised by service, compassion and integration. It is a point of intuition, and it allows access to the soul.
If the Neutral Mind is weak, you may find it hard to make decisions, may feel victimised or find it challenging to see beyond the polarities of life. The key to balancing the Neutral Mind is to meditate.