Magic Forums

Ok. So I've seen a lot of spells browsing through the spellbooks about taking another witch's power as your own. But all of these I've seen require some sort on wand work, incantation, time, moon phase, et cetra. I have two questions in this concern.
1: a lot of people who are not pagan in belief or practice have some kind of power be it healing, psychic, or what ever else. So is the practice of taking another witch's power as your own limited to only witch's as implied and obviously stated or is the matter open for general people witch or not?
2: I don't really like doing spells that involve incantations. I prefer energy work without vocalization or any utinsil of any type. But I will do so if need be. So hypothetically speaking if I were to take another person's power as my own can I do so just as effectively by doing so through energy work alone as I could with an incantation and the required items (if any items are needed)?