sealed book

American  

noun

1. something beyond understanding and therefore unknown.

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sealed book British  

noun

1. another term for closed book

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Etymology

Origin of sealed book

First recorded in 1810–20

Example Sentences

A similar explanation of fossils was given by the engineer-artist Leonardo de Vinci in the fifteenth century, and by the potter Bernard Palissy, in the sixteenth century; but thence onward, for more than a hundred years, the earth was as a sealed book to man.

From Project Gutenberg

The revelation still remains, therefore, a sealed book until "after the resurrection."

From Project Gutenberg

Even distant Europe was no sealed book to them.

From Project Gutenberg

Ely, rising majestic from the plain; the very singular and impressive run along the sandy coast from Cromer to Wells-next-Sea; the road on thence to Hunstanton and Lynn; the glorious expanses of heath in many parts of Norfolk and Suffolk; the extraordinary hedges of fir along the roadside near Elvedon and in many another place—all these things, and a score besides—were as a sealed book to me.

From Project Gutenberg

For those for whom Carlyle's Essays are a sealed book because of loss of interest in him with the passage of time, the citation of some of his appreciative critical expressions may be necessary.

From Project Gutenberg