We can speak of free will as a principle in general. And we could have the sense of random occurences, as we might sometimes perceive the unexpected/unlearned thoughts and expressions to be, as following from this principle.
Going back to the beginnings of the universe as popularly expressed by physics: in the ‘big bang,’ we see, perhaps, the first demonstration of that which is according to free will.
A story that also highlights this principle is told of God presenting two options to Adam (mankind), both the one that He loved for them, and the one that He hated for them. He gave man the opportunity to set a precedence.
All expressions of free will amount to the creation of precedence.
Thus, free will is an expression without precedence; one independent of any circumstances. Experiencially, it can be said to be an arbitrary action towards thought that is not the result of previous thought.
And while it is the perfect cause of the truly random and the fully arbitrary, its results always develop into something teleological.
Hence, purpose comes from free will, and not just from a perception of order or design.
With reference to our own inward experiences; while they can/might be engineered or motivated by external stimulations because of our psychology and physiology, there is, and remains, a trump card, the joker: free will.
And some, if not all, of our creativity is bonded to our expression of free will. We can create … new inner trends.
Free will, the fundamental and truest of volitions, is the only faculty that can be non-deterministic in its expressions. Therefore it produces ‘ultimate’ causes. And it is likely the faculty that separates us from other living things, and makes us most like God.