" We should start using the mind as a tool, he argues, instead of letting the mind use us, which is the normal state of affairs. When Descartes said ‘I think, therefore I am,’ he had not discovered ‘the most fundamental truth’, Tolle insists; instead, he had given expression to ‘the most basic error’. "

― Oliver Burkeman , The Antidote: Happiness for People Who Can't Stand Positive Thinking