Please try it now. You may find it helpful to close your eyes for this practice.  Later on, when “being in the body” has become natural and easy, this will no longer be necessary.  Direct your attention into the body.  Feel it from within.  Is it alive?  Is there life in your hands, arms, legs, and feet – in your abdomen, your chest?  Can you feel the subtle energy field that pervades the entire body and gives vibrant life to every organ and every cell?  Can you feel it simultaneously in all parts of the body as a single field of energy?  Keep focusing on the feeling of your inner body for a few moments.  Do not start to think about it.  Feel it.  The more attention you give it, the clearer and stronger this feeling will become..  It will feel as if every cell is becoming more alive, and if you have a strong visual sense, you may get an image of your body becoming luminous.  Although such an image can help you temporarily, pay more attention to the feeling than to any image that may arise.  An image, no matter how beautiful or powerful, is already defined in form, so there is less scope for penetrating more deeply.

From Eckhart Tolle’s The Power of Now