The scientific man, especially the scientific investigator, holds his theories with a light hand, but keeps a firm grip on his facts.


Major Prophets of To-day, Henri Poincare (p. 119), Little, Brown & Co. 1916


The scientific man, especially the scientific investigator, holds his theories with a light hand, but keeps a firm grip on his facts.

The scientific man, especially the scientific investigator, holds his theories with a light hand, but keeps a firm grip on his facts.

The scientific man, especially the scientific investigator, holds his theories with a light hand, but keeps a firm grip on his facts.

The scientific man, especially the scientific investigator, holds his theories with a light hand, but keeps a firm grip on his facts.