I think it would be just to say the most essential characteristic of mind is memory, using this word in its broadest sense to include every influence of past experience on present reactions.

Admiration of the proletariat, like that of dams, power stations, and aeroplanes, is part of the ideology of the machine age.

I am not myself in any degree ashamed of having changed my opinions.

Tobacco . . . is not prohibited in the Scriptures, though, as Samuel Butler points out, St. Paul would no doubt have denounced it if he had known of it.

Punctuality is a quality the need of which is bound up with social co-operation.

In our complex world, there cannot be fruitful initiative without government, but unfortunately there can be government without initiative.

So far I have been speaking of theoretical science, which is an attempt to understand the world. Practical science, which is an attempt to change the world, has been important from the first, and has continually increased in importance, until it has almost ousted theoretical science from men's thoughts.