How to confront the guardian of the threshold

Hi instructors,

How can I confront the guardian of the threshold? Master Samael Aun Weor said we have to invoke the guardian in the internal worlds.

Is there something I need to do to make this happen or is it something that will eventually happen on its own if I simply focus on alchemy and eliminating my egos?

Thanks for all the work you do for the good of humanity.