Famous quotes containing the words single and/or observation:
“The art of leadership ... consists in consolidating the attention of the people against a single adversary and taking care that nothing will split up that attention.... The leader of genius must have the ability to make different opponents appear as if they belonged to one category.”
—Adolf Hitler (1889–1945)
“I should say that the most prominent scientific men of our country, and perhaps of this age, are either serving the arts and not pure science, or are performing faithful but quite subordinate labors in particular departments. They make no steady and systematic approaches to the central fact.... There is wanting constant and accurate observation with enough of theory to direct and discipline it. But, above all, there is wanting genius.”
—Henry David Thoreau (1817–1862)