If you are depressed, you are living in the past. If you are anxious, you are living in the future. If you are at peace, you are living in the present.
Lao Tzu
Every moment you live in the past is a moment you waste in the present.
Tony Robbins
The meaning of life is just to be alive. It is so plain and so obvious and so simple. And yet, everybody rushes around in a great panic as if it were necessary to achieve something beyond themselves.
Alan Watts
You are too concerned about what was and what will be. There is a saying: yesterday is history, tomorrow is a mystery, but today is a gift. That is why it is called the present.
Master Oogway (Kung Fu Panda)
The longer we dwell on our misfortunes, the greater is their power to harm us.
Voltaire