I'm not talking about using the mind to answer questions, that leads you nowhere. I'm talking about a single thought "as a question", as used in meditative self-inquiry. A single thought can lead to profound insights can it not? Adya himself says thought is a vital part of meditation and gaining insight. (From "true meditation")
Here is a quote from the book "True Meditation - page 20" by Adya, word for word:
"Which isn't to say that the mind plays no part in spiritual awakening; this is also a common misunderstanding of spirituality. The mind plays a vital role. Thought itself plays a vital role. Later I will talk about how we use the mind in the form of spiritual inquiry. In spiritual inquiry we are actually engaging the mind, in order to go beyond the mind."
Yes, mind/thought is an instrument of Awareness, it is happening within Awareness itself. It seems nearly everyone that realizes their True Nature (seemingly) arrives at that realization through some form of thinking, such as: Contemplation, Reading, Writing, Listening to a teacher, Watching a video, Discussion (or Internet Forums), Inquiry, Prayer. I say seemingly, because in the absolute sense, nothing is occurring in time, there is no time. But within the dream there appears to be a gradual understanding or recognition of Self through the avenue of the mind. But the actual realization occurs when the mind is quieted down, and Awareness reveals Itself as All... Always already Is. So thought is just the jumping off point, the realization occurs through letting go or surrender to what IS. Thought/mind then still operate within realized Awareness, but it has assumed its rightful place.