So, what does penetrating the veil truly entail?

[Unbound]

This is true, without the agreed understanding of their archetypal nature there is a lot of confusion. This is the same issue that is abounds with the personification of God. It must be realized that all is energy and while I do still believe in the valid existence and potential visual potential of such "entities" this of course only pertains to a symbol which one must craft with their own abilities of visualization. Surely I see no invalidity to meeting an 'angel' within a dream or meditation since so long as you understand its principle there is nothing wrong with allowing a form which is comprehensible as a third dimensional communication. That is, not everyone has learned to communicate with light, feelings or simple sounds. Sometimes the identification of the symbol is a communication that is necessary for the learning at the time. I get images of angels in my mind, but of course I am aware that these symbols are my construction and I construct them in a manner that is suitable to my desires of perception.

I do believe it is possible to project these symbols in to your reality, but it would take either a lot of skill in visualization or a powerful emotional charge to power such a vibrant intention of perception.