As long as you have attachment to the body and attachment to objects, fear and suffering will be with you. Therefore Krishna told Arjuna to develop his discrimination and rid himself of body consciousness. Only then he would be able to develop integral vision.
The third eye is associated with alertness and awareness. When you are alert, awake, more into knowledge, then naturally the energy has moved from the lowest chakra to the highest. You know when you are very alert and awake the sexual energy has transformed itself into a different quality of consciousness.
There are ways from light into darkness and from darkness into light. There are ways, also, from the gloom into deeper darkness, and from the dawn into brighter light. The wise man will use the light he has to receive more light. He will constantly advance in the knowledge of truth.
