There is a lot to be said here, as this is the chakra that contains
all the others. Just as white light contains all the colors of the
rainbow, so the 7th chakra is in its essence the awareness of all
the other energy centers. In the Science of Yoga, this is the first
of the higher, out of the body, centers. Up at level 7 we become
aware of the infinite and eternal universe in its blissful state,
lose track of our worldly bodies, and experience the divine states.
The purpose of meditation in yoga is to bring us to this cosmic
awareness, and the more worldly practices such as Hatha yoga and
Pranayama yoga are to prepare us for these higher experiences.