Carl Jung might have had some insight into the Force on this topic;
I have learned that in addition to the spirit of this time there is still another spirit at work, namely that which rules the depths of everything contemporary. The spirit of this time would like to hear of use and value. I also thought this way, and my humanity still thinks this way. But that other spirit forces me nevertheless to speak, beyond justification, use, and meaning, filled with human pride and blinded by the presumptuous spirit of the times, I long sought to hold that other spirit away from me. But I did not consider that the spirit of the depths from time immemorial and for all the future possesses a greater power
than the spirit of this time, who changes with the generations.
My opinion on this is there is a real distinction how we percieve aspects of the Force, and its there where I think the terms living and unifying find meaning. That the living aspect is much more comfortable to work with, and that the unifying aspect much more foreign it is thus even dangerous to oneself. Perhaps that is the only distinction - how we percieve it. The point being though that accessing the unifying aspect seems to mean confronting the depths of the subconscious and venturing into the spiritual unknown.
Carl Jung continues a bit further on to say;
But the supreme meaning is the path, the way and the bridge to what is to come. That is the God yet to come. It is not the coming God himself, but his image which appears in the supreme meaning. God is an image, and those who worship him must worship him in the images of the supreme meaning. The supreme meaning is not meaning and not absurdity, it is image and force in one, magnificence and force together.
.. and;
The image of God has a shadow, and , and
Like plants, so men also grow, some in the light, others in the shadows, and
The image of God throws a shadow that isjust as great as itself, but he also says
The shadow is nonsense, and
It lacks force and has no continued existance through itself. But nonsense is the inseperable and undying brother of the supreme meaning.
So I do agree there is a dark side to the Force, but I see it as more a shadow of the Force itself. In this way I actually see the Force as 100% light. I think any use of emotions is a distraction from the Force, and is a misintepretation of what the dark side might be. I havent experienced any dark Force yet, but I have experienced parts of the Force so foreign they automatically generate an instinctual emotion reaction such as fear, thus appearing to be a dark force.
I find the Jedi philosophy really sits perfectly with the living aspect but I think the Sith code is a little more specific to dealing with the unifying aspect.... unfortunatly the nature of delving into the subconcious with any depth means confrontation with various potentials for madness so it makes sense that the Sith as portrayed by Hollywood turn out to be maniacs with diagnosable mental disorders!! That's a bit harsh though, and I'm finding a lot of the symbology of working with the spiritual dimension is what is popularily labelled as evil. I do though believe in evil, but only the type of behaviours displayed by animals like us humans, as I've yet to run into genuine supernatural evil.
As a result I just think any real world Sith would be almost a graduate program unto the Jedi path, taking the important foundations of the Jedi way and focusing on delving into the subconcious - to discover deeper truths about the Force. Perhaps Carl Jung's 'The Red Book' might be an apt inclusion into a Sith canon for the real world!!
Here is an excerpt from it;
www.gnosis.org/library/The-Red-Book.pdf
Source: Jung, Carl Gustav (2009). Sonu Shamdasani. ed.
The Red Book. Liber Novus