Full Idea
One can step into the same river twice, but one must not expect to step into the same water.
Gist of Idea
One can step into the same river twice, but not into the same water
Source
José A. Benardete (Metaphysics: the logical approach [1989], Ch.21)
Book Reference
Benardete,José A.: 'Metaphysics: The Logical Approach' [OUP 1989], p.156