The past. It's what has already happened… you have no control over it. You can't change the past. If you spend time thinking about the past, it has your focus and concentration.
The future. Thinking and hoping about what may happen, or what you want to happen, gives the future your focus and concentration.
What does this steal from you? It steals the opportunity to be present, in the here and now. The only thing you can control is what you do and how you feel now. By giving your focus to living in the moment, in THIS moment, you have choices… and the opportunity to be amazed at what you can accomplish!
Enjoy this moment below