Three great obstacles to progress: guilt, envy, and resentment. - Dan Sullivan

Success means that you’re making bigger and better improvements that are valuable to others and satisfying to yourself. It means that you can’t think of anything you’d rather be doing than what you’re doing.

If you focus on what you lack, you lose what you have. If you focus on what you have, you gain what you lack.

The results are clear: mental subtraction is one of the most effective science-based techniques for boosting gratitude and happiness.