That's the order of it, I think...
First we need to look-within - introspect - and that is difficult for most people. Which means we need to want to look within before it can be attained - want it enough to persevere.
Once Introspection is attained then there is the possibility of Intuition.
Intuition is a process - it is thinking with the real-true-divine Self. It is the most fundamental thinking of which we are capable; compared with which the great mass of what we call thinking is merely passive 'processing'.
Most of our thinking is 'caused', automatic, un-thinking - that is, it is 'programmed' by our environment and experiences - but the real-true-divine thinking is itself a cause and has no cause - it is a spontaneous origin coming from nothing prior (that is because it is divine, and that is what divine is).
But real-true-divine thinking is not just some different kind of process that happens to be uncaused - it is participating in reality, which means it is intrinsically true.
(Real-true-divine thinking is Freedom; it is indeed the only Freedom - the only time when we our-selves are agent, because autonomous from being-caused.)
So when we are thinking intuitively, our thinking is true; intrinsically true, necessarily true - as well as being creative. It is true because it participates in reality, it is creative because it is uncaused - and these attributes are indivisible because they all are consequences of its nature.
Let us call this real-true-divine thinking Imagination - using Coleridge's distinction of Imagination in contrast to 'Fancy' - which is merely passive, caused, secondary and not-true because relating to not-real things. Fancy is merely a product of normal, automatic processing, an output rearranged from inputs...
But when we define Imagination as the primary, creative thinking that participates in reality; we can see that Imagination is intrinsically valid.
Imagination is indeed primary - it is not merely useful or expedient, Imagination is knowledge.
Imagination is indeed the only knowledge - only that which is imagined (in the way and sense described above) is real and true; and other forms of thinking are not.
In normal discourse, Imagination is synonymous with 'imaginary' i.e. untrue, unreal - but now it is apparent that Imagination is our divine selves thinking in the universal realm of reality: Imagination is knowing.