if, like many people, you tend to be vaguely unhappy much of the time, it can be very helpful to manufacture a feeling of gratitude by simply contemp… - Sam Harris

The sense that we are unified subjects is a fiction, produced by a multitude of separate processes and structures of which we are not aware and over which we exert no conscious control.

You are not in control of your mind — because you, as a conscious agent, are only part of your mind, living at the mercy of other parts.15 You can do what you decide to do — but you cannot decide what you will decide to do. Of course, you can create a framework in which certain decisions are more likely than others — you can, for instance, purge your house of all sweets, making it very unlikely that you will eat dessert later in the evening — but you cannot know why you were able to submit to such a framework today when you weren’t yesterday.
So it’s not that willpower isn’t important or that it is destined to be undermined by biology. Willpower is itself a biological phenomenon. You can change your life, and yourself, through effort and discipline — but you have whatever capacity for effort and discipline you have in this moment, and not a scintilla more (or less). You are either lucky in this department or you aren’t — and you cannot make your own luck.

The promise of spiritual life - indeed, the very thing that makes it 'spiritual' in the sense I invoke throughout this book - is that there are truths about the mind that we are better off knowing. What we need to become happier and to make the world a better place is not more pious illusions but a clearer understanding of the way things are.