My purpose in writing this book is to encourage you to investigate certain contemplative insights for yourself, without accepting the metaphysical ideas that they inspired in ignorant and isolated peoples of the past.
Waking Up: A Guide to Spirituality Without Religion
It is a 2014 book by Sam Harris. Harris discusses a wide range of topics including secular spirituality, the illusion of the self, psychedelics, and meditation. He attempts to show that a certain form of spirituality is integral to understanding the nature of the mind.