Our mind is one of the most powerful tools we have been given, and its power is often underestimated and misused. As humans, we can use our brains for good or for evil. Being conscious of our thoughts and choosing a positive perspective is where mastering the art of positive thinking begins.

My favorite story which demonstrates how our perspective plays a vital key in our happiness is about two five-year-old twin boys whose parents took to see a psychiatrist. The boys were polar opposites. The psychiatrist took one boy into to a room piled high with new toys, expecting the boy to be thrilled. But instead, he burst into tears.

Puzzled, the psychiatrist asked, "Don't you want to play with these toys?”

"Yes,” the little boy bawled, "but if I did I'd only break them.”

Next the psychiatrist the put the other boy into a room piled high with horse manure. The boy yelped with delight, clambered to the top of the pile, and joyfully dug out scoop after scoop, tossing the...