Spiritual intuition is having a sensitive awareness of the energy system within and around every living thing. Science tells us that everything has a vibration, we can then also perceive this vibrational energy as a sound and/or colour -- it can be both of these things -- or something you sense with your energy field.
With your eyes closed take a moment to become conscious of the energy above your skin. Once you can feel it, imagine that energy expanding. Now become conscious of the heightened energy and feel a sense of love towards it, as you do expand it again and feel more love. Keep adding love until you start to feel a vibration. If you were to give a musical tune to that vibration what would it be?