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All men by nature desire knowledge.

The great and unlooked for discoveries that have taken place of late years have all concurred to lead many men into the opinion that we were touching on a period big with the most important changes.

The great discoveries are usually obvious.

Men love to wonder, and that is the seed of science.

There seems to be one quality of mind which seems to be of special and extreme advantage in leading him to make discoveries. It was the power of never letting exceptions go unnoticed.

Not only has this subject been long associated with the ideas of thinking men over the ages but its practical importance is attested to by the huge resources of men and material thrown into this type of work.

I don't believe in the Great Man theory of science or history. There are no great men, just men standing on the shoulders of other men and what they have done.

All great men are gifted with intuition. They know without reasoning or analysis, what they need to know.

One of the greatest discoveries a man makes, one of his great surprises, is to find he can do what he was afraid he couldn't do.

The greatest discovery of my generation is that man can alter his life simply by altering his attitude of mind.