Controlled Substance

Famous quotes containing the words controlled and/or substance:

“Science is a system of statements based on direct experience, and controlled by experimental verification. Verification in science is not, however, of single statements but of the entire system or a sub-system of such statements.”
—Rudolf Carnap (1891–1970)

“True, I talk of dreams,
Which are the children of an idle brain,
Begot of nothing but vain fantasy,
Which is as thin of substance as the air,
And more inconstant than the wind, who woos
Even now the frozen bosom of the north,
And being angered, puffs away from thence,
Turning his side to the dew-dropping south.”
—William Shakespeare (1564–1616)