Non-duality/A Course in Miracles teacher David Hoffmeister goes into why it is so helpful to let go of definitions.

ACIM uses symbols that seem dualistic to undo the belief in duality. Non-dual teachings can be helpful but the deceived mind needs a lot of mind training. Unless your experience is a constant state of peace, the idea of non-duality is just another diversion for the mind that is sleeping.

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