Eckhart Tolle here:
Having access to that formless realm is truly liberating. It frees you from bondage to form and identification with form. It is life in its undifferentiated state prior to its fragmentation into multiplicity. We may call it the Unmanifested, the invisible Source of all things, the Being within all beings. It is a realm of deep stillness and peace, but also of joy and intense aliveness. Whenever you are present, you become "transparent" to some extent to the light, the pure consciousness that emanates from this Source. You also realize that the light is not separate from who you are but constitutes your very essence.
Identification with your mind creates an opaque screen of concepts, labels, images, words, judgments, and definitions that blocks all true relationship. It comes between you and yourself, between you and your fellow man and woman, between you and nature, between you and God. It is this screen of thought that creates the illusion of separateness, the illusion that there is you and a totally separate "other." You then forget the essential fact that, underneath the level of physical appearances and separate forms, you are one with all that is.
Being is not only beyond but also deep within every form as its innermost invisible and indestructible essence. This means that it is accessible to you now as your own deepest self, your true nature. But don't seek to grasp it with your mind. Don't try to understand it. You can know it only when the mind is still. When you are present, when your attention is fully and intensely in the Now, Being can be felt, but it can never be understood mentally. To regain awareness of Being and to abide in that state of "feeling-realization" is enlightenment.
-- Eckhart Tolle