She speaks from a mind overflowing with general information, made available by a retentive memory, a ready wit, and in exhaustible good spirits.
"The Idler in France"
Marguerite Gardiner
But a hundred generations have not exhausted the common properties of animals or of plants, of sulphur or of phosphorus; nor do we suppose them to be exhaustible, but proceed to new observations and experiments, in the full confidence of discovering new properties which were by no means implied in those we previously knew.
"A System Of Logic, Ratiocinative And Inductive (Vol. 1 of 2)"
John Stuart Mill
For by another paradox-this time not of art but of nature-the extraordinary is exhaustible and the ordinary is not.
"The English Novel"
George Saintsbury