Life without Princess Mary, little as he seemed to value her, was unthinkable to him.
(2) Time is infinite motion without a moment of rest and is unthinkable otherwise.
But, as in 1800, it was the unthinkable that happened.
The result then is briefly thus: In place of the one absolute position, which in some unthinkable way the common understanding substitutes for the absolute positions of the n attributes, we have really a series of two or more positions for each attribute, every series, however, beginning with the same (as it were, central) real (hence the unity of substance in a group of attributes), but each being continued by different reals (hence the plurality and difference of attributes in unity of substance).
I suppose there are some people who would consider it unthinkable to keep it in operation.