We are used to think that the letters are just signs representing sounds and the words simply as the combination of these signs and then of these sounds. For modern languages, not accidentally are identified as "vulgar", it is really so: letters and words are only the graphic representation of sounds with no meanings except those produced by the sounds. In short, modern languages are very similar to animal yelps: they are just sounds.
Ancient languages were completely different. Each single letter of the alphabet had a very complex symbolic value and their combination in the construction of the words produced very deep and articulated symbolic universes in graphical terms. This condition created a symbolic dimension preceding the same vocal expression of letters and words. In practice, it materialized the complex relationship between "Mens" and "Vox".
This characteristic can be found in Latin (for this reason considered as a sacred language) as well as in all ancient languages such as ancient Greek or Hebrew.
Consider for example the great symbolic value that the letter "Y" had for the Pythagoreans. But this symbolic value is linked to all the letters. As with Egyptian hieroglyphs (which were used to represent the sacred sphere), the Latin letters are combined to create words with a remarkable symbolic power and value whose the written representation produces a highly complex symbolic message that, for those who know this value and meaning, no further explanation is therefore necessary.
The deep and symbolic value and meaning of the Latin can be therefore found in the writing. Consider, for example some words like:
MATER - PATER
Another very representative example is the word "PONS." If we look closely, knowing the symbolic meaning of each letter, we can immediately notice that this word cannot mean just "bridge" in the modern, and therefore "vugar", sense. In the "P" before the "O", preceding the "N", with at the end the "S", we may see a path, a precise symbolic process which, not surprisingly, generates words such as "Pontifex".
This also explains why the Latin used the declinations rather than articles. The declination adds precise meanings to the word by adding certain letters: the article does not change anything, does not add anything in symbolic terms. The use of the articles thus becomes instrumental to the languages when they become "vulgar", "profane" or not sacred. These "modern" languages cannot be used to describe the world in "sacred", "metaphysical" and "qualitative" terms, but only in "phenomenic" and "quantitative" term. And this explains why the Latin, as all the ancient languages, it is so difficult to learn in its authentic meaning.
We are unable to see and describe the world, nature and reality in sacred terms also because our languages cannot practically and technically do it. Modern languages may adequately describe a smartphone, a chemical or physical phenomenon, but nothing pertaining the sacred sphere.
It is a very complex issue, which obviously can not be discussed here. But I hope, thanks to these few and brief reflections, to have provided some contributions to recognize the presence of a complex symbolic universe hidden in the letters and words: an universe we moderns have completely lost.