The seven Chakras

The word chakra means wheel or disk in Sanskrit and signifies one of seven basic energy centers in the body. Each of these centers correlates to levels of consciousness, and to archetypal elements, developmental stages of life, colours, sounds and body functions.

Left click on the images to read more about each chakra

When the mind is attached to worldliness, consciousness dwells in the three lower centers. Then there are no high ideals and pure thoughts, and the mind is preoccupied with lust and greed. When the energy rises to the fourth center, the heart or Anahata, spiritual awakening takes place.
At this stage the heart is flowering with love, and man has a spiritual vision of the divine light. His mind then no longer runs after worldly pleasures. When the fifth and sixth chakra (throat and eyebrow) are awakened man becomes free of ignorance and all information is available to him through his intuition. Finally, when the energy reaches the crown chakra on the top of the head, man experiences Samadhi. Samadhi is a state where consciousness experiences itself and its oneness with the Universe.

Chakra Dhyana is a very powerful meditation to clear and balance the chakras and activate the kundalini, so that one can grow in consciousness;  See also Chakra Dhyana