The idea of protoplasm, which was really a name for our ignorance, [is] only a little less misleading than the expression "Vital force".

Science is vastly more stimulating to the imagination than the classics.

If materialism is true, it seems to me that we cannot know that it is true. If my opinions are the result of the chemical processes going on in my brain, they are determined by the laws of chemistry, not those of logic.

The idea of protoplasm, which was really a name for our ignorance, [is] only a little less misleading than the expression "Vital force".

It was a reaction from the old idea of "protoplasm", a name which was a mere repository of ignorance.

[Children] are taught that it is a virtue to accept statements without adequate evidence, which leaves them a prey to quacks of every kind in later life, and makes it very difficult for them to accept the methods of thought which are successful in science.

There is no great invention, from fire to flying, which has not been hailed as an insult to some god.