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For grey matter, there is no black and white. If you think in black and white, then you do not use enough brain functions.

Petek Kabakci
mind judgement brain thinking judging black-and-white grey duality human-mind thinking-quotes human-brain shades multidimensional duality-of-opposites multidimensional-awareness multi-dimensional-reality brain-functions grey-matter mental-functions shades-of-colors