Meanings of occult relation in English

There is probably no occult relation between first editions and onions.

Or is there some occult relation between spheres and hoops?

Could it, as his aged teacher averred, have some occult relation to a higher religion?

The greatest delight, which the fields and woods minister, is the suggestion of an occult relation between man and the vegetable.

But the vicar was too practical a man to waste time in speculating upon the occult relations of seemingly disconnected facts.

Such men comprehend the necessity of considering substances not merely in their mathematical properties but also in their entirety, in their occult relations and affinities.