We find it strong, pliable, insusceptible to either heat or cold and to all appearances will be more durable than anything we have ever used.
"Natural and Artificial Duck Culture"
James Rankin
So, too, the man who takes his fill of every pleasure and abstains from none becomes a profligate; while he who shuns all becomes stolid and insusceptible."
"Editorials-from-the-Hearst-Newspapers"
Brisbane, Arthur
They may conclude too hastily, that nature has formed man insusceptible of any other government than that of force, a conclusion not founded in truth nor experience.
"Memoir, Correspondence, And Miscellanies, From The Papers Of Thomas Jefferson"
Thomas Jefferson