Meditation is not absence of thought, but rather a presence of awareness. Guided meditation is one way to meditate which trains the mind to focus and be lead deeper in the ability to attain a state of consciousness that is totally different from the normal waking state. It is the experience of inner stillness, the mind is silent and is no longer distracted by you. You are free, joyous to be fully awake and present in the here and now, profoundly calm and still.
This is a great introduction to meditation or just an easy one to fall back into when you want to find that inner stillness. Go on, give it a try.