What is the one line that can change our lives completely if we apply it in our day to day life?

Take responsibility for your actions and reactions.

"Take responsibility for your actions and reactions" encompasses two fundamental principles:

Actions: Owning up to your choices, decisions, and behaviors is a mark of maturity and accountability. It means understanding that every step you take, intentionally or not, has consequences. By acknowledging and taking responsibility for those actions, you can learn from mistakes, make amends where necessary, and move forward with integrity.

Reactions: Life is filled with events that are beyond our control. How we respond to them, however, is within our control. Taking responsibility for our reactions means that instead of blaming external factors or individuals for our feelings, emotions, or subsequent actions, we recognize that our reactions are a result of our interpretations, perceptions, and emotional states. By doing so, we can better navigate challenges, adjust our perspectives, and manage our emotional responses in a more constructive manner.

Applying this line in day-to-day life can lead to personal growth, improved relationships, and a sense of empowerment, as it emphasizes the idea that while we might not control every event in our lives, we always have control over how we handle them. That is a powerful feeling in a universe where we are in essence the very opposite.