The above motto was born of my experience with acceptance-based behavioral therapies and the art of letting negative thoughts come and go without buying-in or becoming distracted by these thoughts. We all have fears and struggle in different scenarios, but when we are equipped with the correct mental tools, we are able to eliminate distractions by focusing on what will help us perform optimally.
When our heads are on straight, we are not focused on what happened in the past nor looking anxiously to the future. Instead, we are focused on the relevant cues for the task at hand, which will ultimately help us to control our fate or performance in any situation.