These are the Pillars of Reality of the Golden Path. These pillars are the foundational support of the Zensufi worldview.
Pillar One: Causality
Accept, if you will, that there is a moment, far back in time, in which all came into being. Call it the Big-Bang. We cannot speak of what came before - it would literally be beyond comprehension. All matter, energy, time, light, dimension and so on came into being at that moment.
That one moment was followed by another, directly the cause of the first. The second moment predicated the next, and so on to this very moment. It is an unbroken chain of causation.
The interaction of energy, time, distance, light and matter of that moment has cascaded forward into this moment, a multitude of interactions beyond our ability of comprehension. This is simple physics, simple logic. All results are the results of causes, all causes are are themselves the results of further causes.
This is true of your mind and your body as well. The bio-chemical and electrical signals of your brain in this moment are predicated by your diet, by hormones released in response to the day, to the genetics from your parents, from your grandparents.
Your thoughts, made of the physical and electrical state of your brain and body are all predicated by the causes that preceded them.
Your choices, a product of thinking, are all directly connected to the preconditions of your body, environment and brain.
Your choices, not only in effect, but in reality, are the result of the Big Bang. No thought, thus no choice, is free of this chain of cause and effect.
Pillar Two: Inevitability
All preconditions lead to a result. The total collection of preconditions lead to one and only one direct result. If total preconditions lead to multiple results, they would not be preconditions. Without a pre-existing state, the subsequent state cannot arise. The state is unitary. Distinct preconditions lead to a distinct outcome. This is the basis upon which we are able to divine theories such as thermodynamics or the laws of conservation of energy. Without the certainty of preconditions leading to a single direct result, such laws would be heuristics. Our universe would be discontinuous. A body moving in a direction will continue to do so unless acted upon by another force. It will not usually move in a direction and then randomly change direction - that is discontinuity.
Therefore, all results are inevitable given the preconditions. No choice made could have been different than it was, no event, action, thought, moment, is free from the preconditions that came before. The chain of causality leads to inevitable results.
Pillar Three: No Predestination
Though events are causally bound and inevitable, predestination requires the existence of a future, and there is none. We may not speak of the future in any sense but the abstract, for it is wholly the result of preconditions. While there may be a destination that is reached, it is not predestined for the field of reality we call the future does not exist before it is arrived at. It is, at best a potential field of reality, not an extant one.
Pillar Four: Free Will is Epiphenominal
There is no randomizing element in a causal universe that is not predicated by its predecessors. Free Will, choosing between two or more options of action or thought divorced from the action of any agent cannot exist, but clearly appears to in our personal experience.
That it exists in our experience, but not in reality, is the epiphenomenal nature of free will.