The Torah is Hashem’s masterpiece. Hashem signed His work!!
The middle letter of the Torah is an Aleph. ( In Vayikra 8:28)
Hashem is One is the centerpiece of the Torah.
Following this Aleph are 6 words numerically equaling the Shema.
Also same number of words and letters as the Shema.
The Shema has an Aleph as its middle letter (the 13th letter) and the 6
words of the numerically equivalent also has an Aleph as its middle
letter.