One of the best books on psychology, and the fundamentals of human thought and cognitive biases - this book is a must-read for anyone who wants to understand how the mind works, and why we have the thoughts we do.
by Daniel Kahneman
This book is helps give a fundamental understand of the important differences between the conscious and the subconsious mind, which are both always active and play critical roles in every one of your thought processes.
The central thesis is that there exist two modes of thought:
Each system is specific strengths and weaknesses, including cognitive biases, that need to be understood in order to think usefully.
The book highlights several decades of academic research to suggest that people place too much confidence in human judgment, specific to System 2's conscious, rational thinking. In simple terms, be believe our thoughts too much, even though there is no evidence they are true. This fundamental attachment to those beliefs ("my thoughts are true") is one of the key underlying mechanims of depression, psychological addiction, the not good enough story (impostor syndrome), social anxiety, suicidal thoughts, and many many more unhepful areas of mistaken belief.