Depends on what you mean by magick. Can you learn how to throw fireballs or force-choke? No. Can you learn how to make improbable things happen the way you want them? Yes.
Nietzsche had it right: a yes, a no, a straight line, a goal. Walking with Crowley in the Desert, if you looked back, what would you see? A man? A demon? An adept? There are no easy answers.
Anything you say about magic, stands as a critique of any belief.... yet, with even less room for the self. Undertake the practices for yourself. Train seriously. Don't just follow a "recipe book" and conclude its bs when it doesn't work.
That's the only way you will ever know. Noone can show you magick. As Lon Milo Duquette says, yes "it's all in your head, you just have no idea how big your head is".
When it works for you, your worldview will be shattered. What if magick is the essence that fuels reality? How can you witness it if you are surrounded by it? No one performs magick, one manipulates magick.
The problem is that people think that "subconscious" psychological techniques and placebo is the real deal, and that "magick" is a fantasy thing. Magick is not defined by interpretation "magick is what you want it to be" sort of stuff. Magick is a way of altering probabilities, reality, and the physical world.
I like this quote from Arthor C. Clarke: "Any sufficiently advanced technology is indistinguishable from magic.”
I believe we all have the potential, but it'll take searching, studying and training and avoiding the pitfalls of destructive cults and charlatans.
In my opinion Magick is a phenomenon whereby a living organism, manipulates or breaks the laws of reality without the use of technology. This can be either natural or supernatural. Something that involves higher dimensions or time travel, or that breaks causality in my opinion is supernatural. Something that merely creates or manipulates energy, or other living organisms is natural.
Magick is a very personal pursuit and requires intense discipline, a backlog of knowledge, an iron will and determination that is unflappable. Because of all of this it is not something for idle chatter as there is too much that is personal that is on the line and far too much can be lost for no good reason.
Black magick is just one of many paths for baneful magick. Ariel Sharon, the former Prime Minister of Israel, was said to have had a been subject to a magickal attack called the Pulsa Dinura, or Lashes of Fire. It was performed in an ancient cemetery by a group of Kabalistic sorcerers.
The Pulsa Dinura is considered one of the most severe of the Kabalistic curses, and it can only be used against a person who is considered harmful. Purportedly, if the curse is performed by worthy practitioners against an unrighteous target, the target will die within the year.
It is a risky curse to preform because if the angels consider the practitioners unworthy, the curse will boomerang and kill the people throwing the curse. If the curse works, destroying angels block heavenly forgiveness of the subject’s sins, causing a multitude of curses to befall the subject, resulting in death.
So, what happened to Ariel Sharon? He was incapacitated by a stroke in 2006, about a month after the curse was preformed, and he was in a coma for eight years before dying in 2014. Yitzhak Rabin, an Israeli statesman and general, was also said to have been a victim of the curse. Rabin was assassinated in 2005.
So, for those out there that want to invite such occurrences into their lives, I consider them foolish and foolhardy. Remember words carry energy, be very careful what you wish for.