Famous quotes containing the words virtue and/or theory:
“The wonderful purity of nature at this season is a most pleasing fact.... In the bare fields and tinkling woods, see what virtue survives. In the coldest and bleakest places, the warmest charities still maintain a foothold.”
—Henry David Thoreau (1817–1862)
“Don’t confuse hypothesis and theory. The former is a possible explanation; the latter, the correct one. The establishment of theory is the very purpose of science.”
—Martin H. Fischer (1879–1962)