Approaching to Gods/Goddesses implies the adoption of a "language" totally different from the profane one used by "common people". This language is mainly composed of symbols pertaining the Sacred Science: a knowledge of these symbols thus allows an articulation and understanding of this language to communicate with Deities.
This knowledge is essential also to correctly perform, with their more profound and real sense and meaning, to rites, even those simpler, which otherwise remain only a series of meaningless acts and formulas.
Acknowledging the traditional symbols allows also to see the world with different eyes and sight. Maybe this knowledge, in its deepest articulation, is not possible for all, but just the capability to see them with their basic meaning is an important step to create a personal awareness, a first step towards the "awakening".
Here it is not possible to analyze these symbols in detail, but rather to provide some interpretative keys to see them, placing them into their proper dimension.
A first important symbol in the Traditional Roman Religion is surely the Double Spiral.
This symbol is very diffused and profane people consider it just an ornamental and decorative element.
The Double Spiral represents "the Manifestation under its double aspect". It describes the complete development of a Cycle (i.e. Birth and Death), evolution and involution: it is the representation of the Universal Force unraveling from two Poles spooled by the spirals.
The Double Spiral shows many similarities with the symbol of yin-yang because it identifies two opposite and complementary forces or the double action of a single Force. Other similarities may be found with the Caduceus, Dioscures or the two figures with the snake in the Lararium.
The circles described by the spirals represent also the celestial and infernal circles (superior and inferior status respect to the human dimension), previous and future cicles, ascending an descending processes, manifested and non-manifested spheres.
The spiral describes a "spiritus" or a "breath": universal aspiration and expiration (solve et coaugula). All this involves both the macrocosmic and the microcosmic dimensions.
The Double Spiral thus is the symbol showing us the essentials of the Great Law governing the whole Universe.