“Success demands singleness of purpose. You need to be doing fewer things for more effect instead of doing more things with side effects. It is those who concentrate on but one thing at a time who advance in this world. Passion for something leads to disproportionate time practicing or working at it. That time spent eventually translates to skill, and when skill improves, results improve. Better results generally lead to more enjoyment, and more passion and more time is invested. It can be a virtuous cycle all the way to extraordinary results. The ONE Thing shows up time and again in the lives of the successful because it’s a fundamental truth. More than anything else, expertise tracks with hours invested. The pursuit of mastery bears gifts. When people look back on their lives, it is the things they have not done that generate the greatest regret...People’s actions may be troublesome initially; it is their inactions that plague them most with long-term feelings of regret. Make sure every day you do what matters most. When you know what matters most, everything makes sense. When you don’t know what matters most, anything makes sense.”