I’ve read somewhere that Taoism was influenced by the Hermetic teachings from Egypt, thus accounting for similarities between the Kybalion and Tao de Ching.
However, it seems that there is also a distinction between pure philosophical Taoism and the Taoism which involves alchemical practices. Could the latter be something that might also have been influenced by alchemical practices of the other lands of the time?
Definitely not an old book, although based on old (you might say “perennial” or “timeless”) principles.
I don’t know what Horowitz covered in his book, I’d need to investigate.
Re Napoleon Hill and others, this is a very worthwhile video to watch to recognize (particularly some of the history about events from Napoleon Hill’s own life)
No idea. But people have been learning from each other and exchanging ideas and practices from the very beginning.
I think it doesn’t really matter how old the Kybalion is, or even who contributed to its most recent versions.
Human beings are flawed and evolving. No book is going to change that.
At the same time, principles and practices exist that can facilitate our deepening and development. That’s going to remain as well.
In a traditionalist context, people who want to appear authoritative claim that their ideas are very old. It was common to attribute ideas to some respected elder or mythologized source of the past. In those contexts, doing so makes you and your ideas appear more legitimate.
In a modernist framework, people who want to appear authoritative claim that their ideas are very new and are supported by the most cutting-edge, data, research, and scientific investigation. In those contexts, doing so makes you and your ideas appear more legitimate.
There are various other strategies that are used to bolster validity claims. And as long as there’s a way to appear more legitimate and valid, then there will be people who use that way.
The question is: ‘What works?’
The fact that Horowitz has been on Coast to Coast and Montel Williams doesn’t give him a whole lot of credibility.
James Jani has done quite a few really good videos. Especially the guru one.
This is my favorite
James Jani puts out top-notch documentaries. His two-part series on the law of attraction gurus and cults was spot on. I was in a network marketing company a couple of years ago and they are basically cults like he talks about. The videos are excellent if you haven’t seen them.
Edit: Didn’t realize @emperor_obewan had already posted the video I’m mentioned a few posts above this. 
I feel that anyone interested in personal growth or spiritual growth needs to be updated and aware of how social influence, charisma, and groups like cults work and operate.
It’s the equivalent of earning a learner’s permit and a Driver’s License.
Another resource I recommend is Saints and Psychopaths by the late, great Bill Hamilton.
Isn’t that sort of the purpose of PCC?
Minus the ‘cult’ bit, I’d say it’s the literal purpose of Power Can Corrupt. And I bet it would help one to sniff out and recognize cult-like tendencies as well.
Personally, the reason I like the Kybalion is because its teachings are based on ancient Greece and Egyptian teachings and ideas.
The book itself isn’t old, but the underlying idea is as old as time.
Or if you have read it, as old as THE ALL.
However, there are many books and cults that explain reality. I am not sure if there is one CORRECT version and frankly I don’t care what anyone deems correct.
Choose the one that works for you.
The Kybalion and hermetic teachings have opened up a new (old) realm for me that which I thought, didn’t exist. And I saw it myself. This is why I chose that.
As with everything, it is a question of your belief since what you believe, shapes your reality.
Also, I am sure @Hermit is already typing a long, concise, and surprisingly powerful answer as always 
If you can remove all that withholds a person from truly executing this module there is no Mountain unmovable for him, no achievement not achievable, no award unwon.
For Faith is the only miracle worker it being Gods touch in this world. It is the rope extending downwards from heaven.
It is the ultimate form of confidence for those who has seen this yellowish spark and brightness in a humans eyes and stature.
To say move this mountain over here and it shall move. Meaning that if we see a dream, however big and mighty if it is worked towards in faith it cannot be prevented but to be realised.
To think otherwise is foolish and unwise as the physics of reality itself announce this fact. But those who bear its mark can and embody it with all their being are true governors over their life and reality.
I cannot comprehend why this is not in every program and custom. If sufficient energy is put into this program that it is constantly manifesting and executing it basically means you can achieve all that you desire without the urgency or need for destroying limits, eliminating nonsense since you are directly stepping above all the lesser truths and aligning directly with the omnipotent creative currents of life.
How is this module not in every program and custom? I don’t even know the answer to this question and I don’t wanna know! LOL 