Of course no Diagram is anything more than a symbolical mnemonic, so to say; in itself it is entirely insufficient and only permits a glance at one aspect, or face, of the world-process. It is a step in a ladder merely, useful only for mounting and to be left aside when once a higher rung is reached. Thus it is that the whole of the elements of Euclid were merely an introduction to the comprehension of the "Platonic Solids," which must also, in their turn, be discarded when the within or essence of things has to be dealt with and not the without or appearance, no matter how "typical" that appearance may be. Sufficient has already been said of the Universal Principle, of the Universal Root and of the Boundless Power--the Parabrahman (That Which transcends Brahmâ), Mûla-Prakriti (Root-Nature), and Supreme Îshvara, or the Unmanifested Eternal Logos, of the Vedântic Philosophers. The next stage is the potential unmanifested type of the Trinity, the Three in One and One in Three, the Potentialities of Vishnu, Brahmâ, and Shiva, the Preservative, Emanative, and Regenerative Powers--the Supreme Logos, Universal Ideation and Potential Wisdom, called by Simon the Incorruptible Form, Universal Mind and Great Thought. This Incorruptible Form is the Paradigm of all Forms, called Vishva Rûpam or All-Form and the Param Rûpam or Supreme Form, in the _Bhagavad Gîtâ_[122] spoken also of as the Param Nidhânam or Supreme Treasure-house,[123] which Simon also calls the Treasure-house [Greek: thaesauros] and Store-house [Greek: apothaekae], an idea found in many systems, and most elaborately in that of the _Pistis-Sophia_.