Roberto Assagioli about the star at the top of his Egg-diagram:
“The jewel is also one of the most meaningful spiritual symbols.
It corresponds in my diagram to the star symbolising the spiritual Self. It is drawn as a star because the diagram is two-dimensional but it is better to regard it as a jewel. It can be used in an active technique in which a real jewel, a diamond or sapphire, is taken, observed closely, contemplated and its meaning reflected on.” (Dialogue with Assagioli, by Martha Crampton, may, 1966)
“Eastern philosophers also maintain that the human soul is like the lotus flower, and that it has nine main petals, divided up into three groups. The first group stands for spiritual knowledge, the second stands for spiritual love, and the third for spiritual strength. At the centre is the ‘Jewel of the Lotus’, the divine Essence, which is only revealed when an individual’s spirit has fully developed. Certain Eastern methods of development and meditation are based on this lotus symbolism.” Transpersonal Development, p. 90, 2007
“In the East this is represented by the symbol of a lotus with a radiant jewel at the center. The petals of the lotus represent whirlpools, or vortexes of energies of various quality, and as these vortexes develop, interact, and become highly organized, they symbolize the opening of the lotus. They correspond to the transpersonal, superconscious functions and processes. Instead the radiant jewel at the center represents the hub, the hinge, the Self … a spark of universality, the unmoved mover. Here we find again all processes sustained, and in a sense included, in an immutable reality. This is expressed in the Eastern formula “Om Mane Padme Hum!”, “Hail, the jewel in the lotus!” (The superconscious and the Self)