Three circles of Vô Vi (non-action)
The three yellow, azure and red circles which are connected in the shape of a triangle or a horizontal line. These three colors symbolize Buddhism, Taoism and Confucianism respectively.
Sermons of His Holiness Hộ Pháp:
Trí Huệ Cung is the Third Great Way, which is Vô Vi Chi Pháp (Non-action strategy). Therefore, the three material circles of yellow, azure, red are created to represent it. They seem empty, but, in fact, is bí pháp (esotericism). Their horizontal position refers to justice. Buddhism, Taoism and Confucianism interact mutually without any distinctions.
The only important thing now is a complete union, which is also a magical secret. White is the master color, so to practice esotericism you have to turn to Buddhism, which is the non-action strategy, avoiding sound and appearance. You have to concentrate on Thiên Lương (Holy Sense) to unite with the One. That is the foundation for you to gain the state of enlightenment. That is the true path. God is Lý, so Lý is brilliant enough to cover the cosmos.
Understanding Lý Hư Vô, you then achieve the ultimate religious goal, look through your mind with your naked eyes, get your Divine Eye and then see the three circles of Vô Vi. That is esotericism, which guards Trí Huệ Cung Thiên Hỷ Động. Everyone looks at this and sees nothing. Yet it is the superb magic. Whether you are liberated or not depends on this single power.
If you practice esotericism without a knowledge of these three circles, you cannot get away from the six earthly desires and the seven feelings nor achieve the six magical powers. That is false practice!"