And since the human produces its will through Her, and comprehends the Name through Her – which is the mystery of: Upon this should every pious-one pray... (Ps. 32:6) – upon ‘this’ (zot) specifically! – for the sake of Ha-Shem Who is upon ‘this’ (zot).
Why did they the sages establish the morning prayer service, for a particular measure? And so with the afternoon prayer service – for a particular measure, and so with the evening service – for a particular measure, and so on Sabbath – for a particular measure, and so on a festival – for a particular measure, and on the ‘Ten Days of Repentance’ – for a particular measure.