The grade of Dominus Liminis is a "bridge" that connects the outer Order of the G.'.D.'., centred in Yesod, with the Order of the R.'.C.'., centred in Tiphareth. The work of the Dominus Liminis extends and refines the work of the previous grades, synthesising it into a coherent whole. The self-control of the Neophyte, the energy of the Zelator, the one-pointedness of the Practicus and the indifference of the Philosophus are fused together, and turned to the work of strengthening and refining the faculty of aspiration. Indeed, the oath of this grade is precisely this, to "obtain control of the aspirations of [one's] own being". The title "Dominus Liminis" is another reflection of this aspiration: it means "the threshold of the Lord", a reference to the fact that in the next grade, that aspiration will be turned to the attainment of the Knowledge and Conversation of the Holy Guardian Angel.