A theory in its day helps to solve the problems of the day.
The largest single step in the ascent of man is the change from nomad to village agriculture.
Sex was invented as a biological instrument by (say) the green algae. But as an instrument in the ascent of man which is basic to his cultural evolution, it was invented by man himself.
The paradox of knowledge is not confined to the small, atomic scale; on the contrary, it is as cogent on the scale of man, and even of the stars.
The child is not a prisoner of its inheritance; it holds its inheritance as a new creation which its future actions will unfold.
Science has nothing to be ashamed of even in the ruins of Nagasaki. The shame is theirs who appeal to other values than the human imaginative values which science has evolved.
Astronomy is not the apex of science or of invention. But it is a test of the cast of temperament and mind that underlies a culture.
A popular cliche in philosophy says that science is pure analysis or reductionism, like taking the rainbow to pieces; and art is pure synthesis, putting the rainbow together. This is not so. All imagination begins by analyzing nature.
The human baby, the human being, is a mosaic of animal and angel.
Who has not hoped To outrage an enemy's dignity? Who has not been swept By the wish to hurt? And who has not thought that the impersonal world Deserves no better than to be destroyed By one fabulous sign of his displeasure?
The preoccupation with the choice of a mate both by male and female I regard as a continuing echo of the major selective force by which we have evolved.
The progress of science is the discovery at each step of a new order which gives unity to what had seemed unlike.
The private motives of scientists are not the trend of science. The trend of science is made by the needs of society: navigation before the eighteenth century, manufacture thereafter; and in our age I believe the liberation of personality. Whatever the part which scientists like to act, or for that matter which painters like to dress, science shares the aims of our society just as art does.
Knowledge is not a loose-leaf notebook of facts. Above all, it is a responsibility for the integrity of what we are, primarily of what we are as ethical creatures.
Nature is more subtle, more deeply intertwined and more strangely integrated than any of our pictures of her than any of our errors. It is not merely that our pictures are not full enough; each of our pictures in the end turns out to be so basically mistaken that the marvel is that it worked at all.
Follow AzQuotes on Facebook, Twitter and Google+. Every day we present the best quotes! Improve yourself, find your inspiration, share with friends
or simply: