Romance should never begin with sentiment. It should begin with science and end with a settlement.

The proper study of mankind is the science of design.

Human relations are built on feeling, not on reason or knowledge. And feeling is not an exact science; like all spiritual qualities, it has the vagueness of greatness about it.

There is a fundamental difference between religion, which is based on authority, and science, which is based on observation and reason. Science will win because it works.

Religion is to mysticism what popularization is to science.

Ignorance more frequently begets confidence than does knowledge: it is those who know little, not those who know much, who so positively assert that this or that problem will never be solved by science.

It is not enough to know your craft - you have to have feeling. Science is all very well, but for us imagination is worth far more.

Advertising may be described as the science of arresting human intelligence long enough to get money from it.

Nobody climbs mountains for scientific reasons. Science is used to raise money for the expeditions, but you really climb for the hell of it.

The aim of science is not to open the door to infinite wisdom, but to set a limit to infinite error.