Meditation is the way of letting go. First you let go of all perceptions of time to enter the timeless present moment. Then you let go of inner speech to rest peacefully in silent awareness. Next, you let go of most of your five senses’ activity, just keeping awareness of your breath. Then you let go of your breath and watch it disappear.
At this stage, you can no longer see, hear, smell, taste, or feel touch. It appears that your body has vanished, and in its place you are mindful of a beautiful light, the nimitta. The nimitta is a reflection of the citta (the mind), seen through the sixth sense. Then you let go of all controlling to merge into the light and enter the bliss of the jhana world. Thus, jhanas are what happen automatically when you really let go; they are described as the deep stages of letting go. The Buddha clearly and repeatedly stated that full enlightenment could not be attained without the experience of a jhana. Yet today, some teachers claim that such a degree of letting go is unnecessary. They often cite the Buddha’s well-known brief teaching to Bahiya, as recorded in the Udana (Ud 1.10).