Eckhart Tolle

People tend to dwell more on negative things than on good things. So the mind then becomes obsessed with negative things, with judgments, guilt and anxiety produced by thoughts about the future and so on.

If we live a self-directed, self-motivated, self-centered life, always needing to get our own way, then we're going to be miserable. In fact, many times we believe it's our problems that are making us unhappy when, in reality, it's because we're focused on ourselves!