“Isn’t this emphasis on the power of positive thinking wrong?”

No, it is still valid as far as it goes.  You will develop more and have a greater impact for good if you trust in Me and believe in yourself—not in your ego, your will, but in your spirit and your destiny.

“Destiny?”

Yes, there is a goal for you (for a person)—an individual path of evolution—that I want to help you along.  Believing that you can progress and trust in Me to help you is very helpful in achieving that goal.