"Alan Wallace explains the role of mind in any empirical investigation of consciousness: “The primary instrument that all scientists have used to make any type of observation is the human mind…” However, like any scientific laboratory, one has to first clean, fine-tune, and calibrate the mind: “The untrained mind, which is prone to alternating agitation and dullness, is an unreliable and inadequate instrument for observing anything. To transform it into a suitable instrument for scientific exploration, the stability and vividness of the attention must be developed to a high degree.” This is the scientific importance of yoga, meditation, kundalini, tantra and other systems of achieving higher states of mind, and more evolved states of body, which may then be used to discover deeper layer of reality: “Over the past three millennia, the Indic traditions have developed rigorous methods for refining the attention, and then applying that attention to exploring the origins, nature, and role of consciousness in the natural world. The empirical and rational investigations and discoveries by such great Indian contemplatives as Gautama the Buddha profoundly challenge many of the assumptions of the modern West, particularly those of scientific materialism.”"