Thank you for a challenging article. I would like to use the two challenging words - power and constructive - in a metaphor to support your argument.
To construct is to build. That is what we have to do in our lives. We have to build a victory tower, using our successful ventures of the past as the bricks of this construction. And use positive thinking as the cement to fill the gaps between the bricks.
If we remember the ups and downs of our own life paths we can draw upon the history of our successes and use the failures as learning experiences. In that way we will develop a different mindset where positive thinking plays an important role.