If you constantly worry or dwell on the past you can be left in a certain state of depression, and often consistent worry about the future can lead to other stresses and anxieties developing as well. The Power of Now teaches you exactly that - the power of being in the now, of being in the present moment. There is a classic saying “the past is history, the future is a mystery, the present is a present because the present is a gift”! Eckhart Tolle highlights the important of practising mindfulness of being in the present moment and truly appreciating where you are at that current time, as when you remove the stresses and anxieties of overthinking about certain things, you can have a more happy, peaceful and fulfilled life as a result.