Neuroplasticity specifically applied to depression. You can re-wire your brain out of depression by making new neural patterns to use instead of the old depressive ones. You can immediately lessen the pain of depression by literally disconnecting the message that you are depressed from one part of the brain to the other.

You make your own brain by your habitual thinking and behavior day by day, neuron by neuron. This is how we learn something new, or acquire a new skill such as playing the piano.

Get your brain to think what thoughts will be helpful rather than let the brain think whatever it wanders into through the process of learned association.