There are only a few more practical tips related to the mantra; when you repeat it, imagine there is a dark cave in the center of the chakra.
The Motto is a metaphor of Will. Choosing the Motto is the Aspirant's first attempt of the Great Work.
The relationship between the Motto and the Angel is the same relationship between the Aspirant and the Motto. In every present which continually exists in the same way, the Aspirant, the Motto, and the Angel are one and the same thing.