In a nutshell:
True inner happiness does not come from the material things of this world. What makes our hearts full and our lives meaningful is love, joyfulness, wonderment, gratitude, and a sense of purpose.
As we grow older, and hopefully wiser, we begin to understand that, whether we are wearing a $300 or $30 watch, they both tell the same time.
If the car we drive costs $150,000 or $30,000, we still travel the same roads and arrive at the same destination.