The art of meditation is the art
of shifting the focus of attention to ever subtler levels,
without losing one's grip on the levels left behind...
One begins with the lowest levels:
social circumstances, customs and habits;
physical surroundings, the posture and breathing of the body;
the senses, their sensations and perceptions;
the mind, its thoughts and feelings,
until the mechanism of personality is grasped and firmly held.
-Nisargadatta