Who said "What we know is a mere fraction of what we might know."?

This quote is attributed to Church, Alonzo.

What we know is a mere fraction of what we might know. - Church, Alonzo

"What we know is a mere fraction of what we might know."

Church, Alonzo Knowledge

Logician-Mathematician American 1903–1995

"I found that there were about 600 or so lot of people who were by definition only people who were trying to figure things out."

"The task is not so much to see what no one has yet seen; but to think what nobody has yet thought about that which everybody sees."

"One cannot escape the feeling that these mathematical formulae have an independent existence and an intelligence of their own."

"In mathematics you don't understand things. You just get used to them."

"We're not just after treasure. We're preserving history."

"The mind is humanity's greatest tool."

"A tidy room reflects a tidy mind."

"You can learn a lot about a person by how they keep their space."