Then there must be something to be conscious of, something which we perceive, something which we know, something which we understand, and that something is the object. So, "knowing together" means we know the subject and object together--that is, they both exist; one cannot exist without the other. So wherever there is a subject, there is also an object. That means that wherever there is a thinker, there must be something to think about; otherwise there is no meaning back of the term "thinker". Whenever we use the term "perceiver", we must know that there is something to be perceived. The same is true of consciousness. Whenever we use the term "consciousness", we must know it includes both--the one who is conscious of something, and something of which that one is conscious. Therefore the word "consciousness" implies duality. There is another meaning back of "consciousness" which we often fail to understand, or about which we do not stop to think deeply. That is why we miss it. Consciousness not only implies the idea of becoming conscious of a thing, or the state of being conscious of something, but there is also the idea of identification back of it. What is the meaning of identification? By identification we mean a state in which we become almost one with a thing. When we become one with a thing we become conscious of it. Of course ordinarily we may not be wholly identified with it, but the word consciousness indicates that, and judging our modes of thought, or observing the practical phases of our life, we shall see that there is identification. Take for instance, the word "body-consciousness". What does it mean? It means that not only are we conscious of the body, but we are also identified with it. I can not separate myself from the body; I am almost one with it. I have become mixed up, as it were, with the body and its conditions. There the subject or ego is hidden; only the object of consciousness, the object of perception is there. So that is another meaning of consciousness.