Invoking vs Evoking

​Many witches, myself included, do not do a lot of highly ritualized work. That said, there are many that do, and I have heard these two terms thrown around, and even read them where they were used rather interchangeably. They are definitely not the same thing, and I thought it would be good to point out the difference between them, just in case you come across the same thing.
Invoking, as the name suggests, refers to “calling in” a god/goddess/spirit. Not just into your circle, but into yourself. There are many occasions (like Sabbats or the Great Rite) where ritualistic witches and covens would invoke the goddess into their priestess and the god into their priest. These members allow their deities to “possess” them for a time during the ritual and then release them when the rite is complete. The god, goddess, or spirit that inhabits them is generally given the go ahead to take over and perform whatever task is to be accomplished during that ritual, or answer whatever questions the members have (depending on the reason for invoking them in the first place). This is not something that is taken lightly, and only experienced priests/priestesses take on this responsibility. That said, it would be up to the coven who is chosen to do this, and if you are not part of a coven, things can be a bit trickier (though not impossible). Either way, invoking any entity requires a vessel (read person) to contain the entity while the work is being done.
Evoking, on the other hand, refers to “calling up” a god/goddess/spirit. Basically, this means that you are calling upon on them to appear before you. No living vessel is needed. You may call up on them to appear inside your circle, or inside a circle you have prepared for them. I would say this is more often the chosen path, since it can be done in a group or alone. As solitary practitioners, if we have a patron god/goddess, we might evoke them to gain their help in spell work, to ask for their guidance, to invite them to our celebrations, or just thank them for all they have done.
Both of these usually (but not always) require much preparation and ritual, as well as a good relationship with whichever deity/spirit you wish to contact. I would suggest that if you want to try invoking someone/something, that you talk to someone who has successfully done this before., and be sure you are well versed in ritual so it feels smooth, rather than awkward or “choppy” for you. It might also be a good idea to have someone with you who understands what you are going to do, just to be safe. You never know what things you might be unprepared for if you go it alone. The same could be applied to evocations. It never hurts to consult an expert.
As you can see, these terms are not interchangeable. Have you ever practiced either of these? Or been part of a ritual/ceremony that included one of them? Does it interest you? Do you have any tips/advice to anyone who might be?