Famous quotes containing the words thought and/or experiments:
“it is not possible for there to be in us any thought of which, at the moment it is in us, we are not conscious.”
—René Descartes (1596–1650)
“There are three principal means of acquiring knowledge available to us: observation of nature, reflection, and experimentation. Observation collects facts; reflection combines them; experimentation verifies the result of that combination. Our observation of nature must be diligent, our reflection profound, and our experiments exact. We rarely see these three means combined; and for this reason, creative geniuses are not common.”
—Denis Diderot (1713–1784)