Famous quotes containing the words observation and/or towers:
“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)
“Britannia needs no bulwarks,
No towers along the steep;
Her march is o’er the mountain-waves,
Her home is on the deep.”
—Thomas Campbell (1774–1844)