Positive thinking is just one small part of positive psychology. Plus, as an approach to well-being, positive thinking only helps you to the extent that it yields one or more positive emotions. The problem with positive thinking is that it sometimes just stays up "in the head" and fails to drip down to become a fully embodied experience.
Barbara FredricksonPositive people are able to maintain a broader perspective and see the big picture which helps them identify solutions where as negative people maintain a narrower perspective and tend to focus on problems.
Barbara FredricksonLove is a momentary upwelling of three tightly interwoven events: First, a sharing of one or more positive emotions between you and another; second, a synchrony between your and the other personโs biochemistry and behaviors; and third, a reflected motive to invest in each otherโs well-being that brings mutual care
Barbara FredricksonPositivity psychology is part and parcel of psychology. Being human includes both ups and downs, opportunities and challenges. Positive psychology devotes somewhat more attention to the ups and the opportunities, whereas traditional psychology - at least historically - has paid more attention to the downs.
Barbara Fredrickson