Dhyana
Almost everyone has experienced the fact that when one starts
concentrating his mind on any immediate object or an idea, the
mind starts wandering. It is very difficult to keep the mind
busy with a single thought. The ancient sages too encountered
the same problems. Arjuna, in Gita had mentioned that
controlling the mind is an impossible thing on earth. Hence, he
was advised by Krishna that though mind control is difficult, it
can be made silent and steady by regular practice of vairagya
and abhyasa. However, he has warned that yoga is very difficult
for people whose minds are not steady and controlled.
Pantanjali, in Yoga Sutra has emphasized these two qualities to
achieve mind control. Hence ,these are the very qualities that
make the essence of yoga.
Mind is like a disturbed pond with many impurities. First you
need to stop the inflow of fresh impurities and then remove the
existing impurities to clean the mind. Abhyasa is one of the
practices for purifying the mind. Dhyana is one of the sub
practices of abhyasa. This is a stage that a person reaches
after practicing concentration for some time. At the start of
dhyana, the mind is steadier and only a single thought about an
object arises in the mind. Now it is safe to say that the state
of dhyana is reached. Here, the mind becomes very stable like
the flame of a lamp in a calm atmosphere and its contact with
the object of experience becomes intense and complete.
There are two varieties of dhyana called sagunadhyana and
nirgunadhyana. In the first dhyana, the stillness of mind is
associated with an object of experience which can be experienced
through the sense organs. The second one is completely mental.
It implies complete absorption of mind into itself. Here, the
mind is not associated with any external object. It becomes
completely still in this state. This mind is supposed to remain
still, silent and sensitive such that it can understand any
past, present and future event that might have happened anywhere
in the universe.