Arthur E. Waite - The Pictorial Key to the Tarot :
As this final message of the Major Trumps is unchanged - and indeed unchangeable - in respect of its design, it has been partly described already regarding its deeper sense. It represents also the perfection and end of the Cosmos, the secret which is within it, the rapture of the universe when it understands itself in God.
It is further the state of the soul in the consciousness of Divine Vision, reflected from the self-knowing spirit. But these meanings are without prejudice to that which I have said concerning it on the material side.
It has more than one message on the macrocosmic side and is, for example, the state of the restored world when the law of manifestation shall have been carried to the highest degree of natural perfection. But it is perhaps more especially a story of the past, referring to that day when all was declared to be good, when the morning stars sang together and all the Sons of God shouted for joy.
One of the worst explanations concerning it is that the figure symbolizes the Magus when he has reached the highest degree of initiation; another account says that it represents the absolute, which is ridiculous. The figure has been said to stand for Truth, which is, however, more properly allocated to the seventeenth card. Lastly, it has been called the Crown of the Magi.
P. D. Ouspensky – The Symbolism Of The Таrot :
An unexpected vision appeared to me. A circle not unlike a wreath woven from rainbow and lightnings, whirled from heaven to earth with a stupendous, velocity, blinding me by its brilliance. And amidst this light and fire I heard music and soft singing, thunderclaps and the roar of a tempest, the rumble of falling mountains and earthquakes.
The circle whirled with a terrifying noise, touching the sun and the earth, and, in the centre of it I saw the naked, dancing figure of a beautiful young woman, enveloped by a light, transparent scarf, in her hand she held a magic wand.
Presently the four apocalyptical beasts began to appear on the edges of the circle; one with the face of a lion, another with the face of a man, the third, of an eagle and the fourth, of a bull.
The vision disappeared as suddenly as it appeared. A weird silence fell on me. "What does it mean?" I asked in wonder.
"It is the image of the world," the voice said, "but it can be understood only after the Temple has been entered. This is a vision of the world in the circle of Time, amidst the four principles. But thou seest differently because thou seest the world outside thyself. Learn to see it in thyself and thou wilt understand the infinite essence, hidden in all illusory forms. Understand that the world which thou knowest is only one of the aspects of the infinite world, and things and phenomena are merely hierolgyphics of deeper ideas."