When people say "Let it go," what they really mean is "Get over it," and that's not a helpful thing to say. It's not a matter of letting go - you would if you could. Instead of "Let it go," we should probably say "Let it be"; this recognizes that the mind won't let go and the problem may not go away, and it allows you to form a healthier relationship with what's bothering you.
Jon Kabat-ZinnMindfulness is about being fully awake in our lives. It is about perceiving the exquisite vividness of each moment. We also gain immediate access to our own powerful inner resources for insight, transformation, and healing.
Jon Kabat-ZinnThe only time you ever have in which to learn anything or see anything or feel anything, or express any feeling or emotion, or respond to an event, or grow, or heal, is this moment, because this is the only moment any of us ever gets. You're only here now; you're only alive in this moment.
Jon Kabat-ZinnYou might be tempted to avoid the messiness of daily living for the tranquility of stillness and peacefulness. This of course would be an attachment to stillness, and like any strong attachment, it leads to delusion. It arrests development and short-circuits the cultivation of wisdom.
Jon Kabat-Zinn