I was thinking about the magical systems in fantasy fictions that I am currently reading by 'Mr Magical System' himself (ie. Brandon Sanderson) - when it struck me that the magic we know most about, that of Jesus's miracles, was very different indeed.
While magic in books is usually an 'impressive' matter of light, electricity, noises, super strength/ speed/ endurance/ healing etc - the common feature is that you can See It Being Done.
Whereas nobody reports seeing the miracles of Jesus being-done, actually happening - instead people seemed to notice that they had-already-happened.
People noticed that the water had turned to wine, that a few loaves and fishes had (somehow...) already fed a vast crowd; that soldiers or a mob were surrounding Jesus intending to arrest or kill him - but that Jesus was gone, that after having mud on their lids - the eyes of a blind man could see...
Jesus walked on the waters, which was spectacular - but it just happened, they realised that he was already doing it.
Jesus's miracles re-arranged reality to produce the desired result - and this process of rearrangement was invisible, imperceptible - apparently took place 'behind the sces' or as if in another dimension: to human perception all that was noticed was that things-had-changed.
How to understand this? One way is by the idea of levels of being, or consciousness - in which higher levels are imperceptible - by more real - than the lower levels. So in normal life we are like a simple visible-light-detecting machine - and when what is happening is not light (but is instead accomplished by ultraviolet frequencies, or sound, or smell...) then the dial does not register any change.
Another is to recognise that a higher being might be able to re-arrange things to produce the desired changes, but without those who are changed knowing about it.
This is like a dream - in at least two ways. In a dream the situation is that things change - landscapes change, things appear or disappear, personalities shift.. and usually we see that they have-changed, we don't see it happening.
And when we are dreaming a vast amount can happen in dream time - a hundred times faster than things can happen in waking time. An epic and detailed dream narrative takes only ten minutes by the clock.
In the dream there is a dream-er, of which we who are dream-ing are typically unaware, or only partially and intermittently aware - and of whose exact nature we are uncertain (and it may vary). But the time-scale and level of operations of the dream-er is such that he can accomplish a great deal which is imperceptible to the mind that is dream-ing.
I presume something of this general-kind may partly explain how Jesus's miracles occurred - and how magical results were observed without any sign of magic being-done.
Note: Among fictional magical systems that I know - the nearest to what I mean is the metal Atium in Brandon Sanderson's Mistborn trilogy. 'Burning' of this metal by a mistborn in a fight, does not interfere with foes free agency, but predicts events slightly ahead of their reality by revealing consequences of actions already-initiated - at the same time the mind and body of the Atium-burner is as-if relatively accelerated so that he can calculate trajectories and take rapid compensatory or evasive actions with astonishing rapidity. So the mistborn can pass through a crowd of soldiers by knowing in advance where each sword blow will fall, and having time to dodge them all.
In the later Mistborn books, the Wayne character uses a 'bubble' to slow his own time, relative to the time outside the bubble. From within the bubble, the real world is seen as ultra-slo-mo - so the bubble can be erected to allow planning and evasion, even while (for example) a bullet is approaching. To those outside the bubble, Wayne repeatedly 'disappears' from imminent danger (only a brief blur is perceptible), to reappear somewhere safe.
If this sort of thing can be imagined greatly accelerated; and capable of reaching into the very innermost levels of matter - to adjust molecules, for example; then we may have a crude picture of the ways that divine powers could make magic seem already-to-have-happened without perceptible evidence - as with Jesus's miracles, perhaps.