There is a lot of confusion around mindfulness vs meditation vs different types of meditation. This article covers the differences quite well. For the deepest healing and spiritual evolution, I believe it is important to go beyond the senses into silence. Therefore the senses of sight, sound, smell, touch and hearing need to be withdrawn from. The level of cognition and brain activity in a guided meditation is higher than in silent forms of meditation. In the Yoga Sutras, Patanjali talks about Pratyahara - Withdrawal of the Senses - which is best achieved through silent forms of meditation. In this silence, we discover our deepest level of being.