One The Beginning of Dimension
The first of these thirteen symbols is basically the number 1 itself, but not as typed with a typewriter, just a simple line.
Consider that a line is the most elemental part of all writing. Every other symbol we may draw is just a meandering line, sometimes curved sometimes straight, sometimes turning sharply or harshly, sometimes gently.

Then consider that a significant theory in modern physics claims that the tiny particles that make up all of existence may be made of vibrating strings.