Famous quotes containing the words tools and/or include:
“But lo! men have become the tools of their tools.”
—Henry David Thoreau (1817–1862)
“If we define a sign as an exact reference, it must include symbol because a symbol is an exact reference too. The difference seems to be that a sign is an exact reference to something definite and a symbol an exact reference to something indefinite.”
—William York Tindall (1903–1981)