First, you are not just a mind, you are also heart, emotion, spiritual identity. But the mind itself has a quality, a vibration, a note that is recognizable to other minds. Apart from that, the mind remains capable a forming images and carries within itself, subconsciously, a self-image which can be sensed by another being. Furthermore, when we sense a presence in the subtle worlds we tend naturally to form associated imagery corresponding to it. So recognition tends to be automatic and spontaneous. Others are felt, seen, and heard in a way that is analogous to but not exactly the same as, nor limited as, physical plane experience. Beyond all that, for people with whom you are in rapport, there is intimate telepathy or direct sharing of thoughts and feelings.