The spirit of speculation is the same as the spirit of science, namely... a desire to know the causes of things.


Darwin and After Darwin (4th edition), Chapter I (p. 6)


The spirit of speculation is the same as the spirit of science, namely... a desire to know the causes of things.

The spirit of speculation is the same as the spirit of science, namely... a desire to know the causes of things.

The spirit of speculation is the same as the spirit of science, namely... a desire to know the causes of things.

The spirit of speculation is the same as the spirit of science, namely... a desire to know the causes of things.