F. H. Bradley,
Appearance and Reality — Chapter VIII
(1893)
“ It is not always material substance, for we might call an organism identical, though its particles were all different. It is not always shape, or size, or colour, or, again, always the purpose which the thing fulfils. The general nature, in fact, of a thing’s identity seems to lie, first, in the avoidance of any absolute break in its existence, and, beyond that, to consist in some qualitative sameness which differs with different things. And with some things—because literally we do not know in what character their sameness lies—we are helpless when asked if identity has been preserved. ”
