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.
The essence of Liber Resh is not in a single execution, like it may be in Samekh, but in constant, daily repetition, even when you are not aware of progress, to remind you what awaits you at the end of the Path. It reminds you of golden Tiphareth, gently and continuously.
Grades are meridians of the soul and like earthly meridians, they are just a matter of agreement, and as it does not mean that there are clearly visible lines on the planet, it can be said that from the standpoint of LVX, the Grades do not exists.