All manifested matters in this existence, without any exception they are manifested with one invisible dimension which is Spirit. Very evident example is a bottle of Alcohol. When we leave the bottle open, liquid evaporate and we will find an empty bottle. What is went away? That is Spirit. All creatures come with an invisible part which is spirit. And when we are interested in this dimension of existence, we can call it, Spirituality. When the mind would like to interfere in this dimension (unknown for the mind) , it is called religion. We are not dealing here with religion, but with True Nature of Being. Where there is no belief system, but "Is-ness".