Most of us fully expect that we're going to learn things we didn't know about.

Einstein had looked at the numbers and dimensions that went into his equations for gravitational waves and said, essentially, 'This is so tiny that it will never have any influence on anything, and nobody can measure it.' And when you think about the times and the technology in 1916, he was probably right.

We knew about black holes in other ways, and we knew about neutron stars - well, those are the two things that ultimately got seen.

Rainer Weiss Quotes