Just to say this plainly: human beings can never be made happy by the material world. We are spiritual beings and can be emotionally healthy only when we are in touch with a higher world.

Phil Stutz Lessons for Living: What Only Adversity Can Teach You

Yuval Noah Harari Sapiens

The RSA The Spiritual and the Political: Beyond Russell Brand

Joe Dispenza Breaking The Habit of Being Yourself: How to Lose Your Mind and Create a New One

Nick Trenton Calm Your Thoughts: Stop Overthinking, Battle Stress, Stop Spiraling, and Start Living (The Path to Calm Book 2)

Sam Harriss Waking Up: A Guide to Spirituality Without Religion