What I call enlightenment is experiencing the same intensity of life that you feel inside yourself, outside your skin also. You are not alive just inside your body. You are also alive inside every other individual, tree, and rock. Your hold over your physical body is transformed into a hold over the cosmic body! You are alive in every cell in the cosmos. Every cell is a complete, fulfilled part of the cosmos.
There is a beautiful verse at the start of the devotional hymn, Purusha Suktam, in the Vedas,
Om sahasra sheersha purushaha sahasraaksha sahasrapaat
sa bhoomim vishwato vrutva atyatishtha dashaangulam
This verse beautifully describes the whole of the cosmos as a beautiful human form called Purusha – having a thousand heads, a thousand eyes, and a thousand feet. The form encompasses the whole earth and exceeds that by ten times! This is the experience of enlightenment.
Understand, I am alive as much outside as I am inside my skin. So I am alive in all the millions of heads, eyes, and feet and all the millions of beings in the cosmos.
To achieve this, start seeing everything as if you are seeing it for the first time, without bringing in your engrams, your past engraved memories. Then, you will start experiencing the same life and intensity that you experience inside your skin, outside also. Try this for ten days. Once you get a glimpse, you will never miss it! You will see you are in ecstasy for no reason. You are in excitement for no reason. You will never take things for granted again. You will always be in joy.
source: Living Enlightenment