Usui was an admirer of the literary works of the Emperor Meiji (明治天皇 Meiji tennō). While in the process of developing his Reiki system, Usui summarised some of the emperor’s works into a set of ethical principles (called the “Concepts” 概念 Gainen), which later became known as the Five Reiki Precepts (五戒 Gokai, meaning “The Five Commandments”, from the Buddhist teachings against killing, thievery, sexual misconduct, lying, and intemperance). It is common for many Reiki teachers and practitioners to abide by these five precepts, or principles.
The five concepts of Mikao Usui, contained within the whole text (Japanese writing is read from top to bottom, moving from right to left). Note: Commonly called the Five Precepts or Five Principles, they start in the third column from the right below the space, and continue in the fourth and fifth columns from the right.
The secret art of inviting happiness,
The miraculous medicine for all diseases.
At least for today:
Do not be angry,
Do not worry,
Work with diligence,
Be kind to people.
Every morning and evening, join your hands in meditation and pray with your heart.
State in your mind and chant with your mouth.
For improvement of mind and body.
Usui Reiki Ryōhō.