Carol Dweck, Ph.D., author of "Mindset: The New Psychology of Success" re-describes the old adage "your mindset determines you life" using decades of research. She has found "the view you adopt for yourself profoundly affects the way you lead your life."
She describes the fixed mindset as one in which you are constantly striving to validate yourself and prove you are something. The growth mindset focuses on developing yourself and stretching yourself to learn, and become, something new.
Read more about her research here: www.brainpickings.org/2014/01/29/carol-dweck-mindset/