The Usui Reiki Ryoho Gakkai (Usui Reiki Healing Society) built this memorial to honor Usui-sensei. Below are some short excerpts from that memorial.
"Reiki not only heals disease, but also amplifies innate abilities, balances the spirit, makes the body healthy, and thus helps achieve happiness."
"Philosophical paradigms are changing the world. If Reiki can be spread throughout the world it will touch the human heart and the morals of society. It will be helpful for many people, not only healing disease, but the Earth as a whole..May many understand what a great service Usui-sensei did for the world."
See the Usui Memorial page at reiki.org for the full translation.