It is merely the superficial which we can see from the front only; the solid can be perceived from every possible direction, and changes shape according to the direction looked at.
The great master of English verse, Swinburne is also a poet much given to parallelism; for he has found it of incomparable use to him in managing new forms of verse.

He uses it in an immense variety of ways--ways impossible to Japanese poets or to Finnish poets; and the splendour of the results can not be imitated in another language.

But his case is interesting.

The most primitive methods of Finnish poetry, and of ancient poetry in general, coming into his hands, are reproduced into music.

I propose to make a few quotations, in illustration.