John Tyndall Quote

The brightest flashes in the world of thought are incomplete until they have been proved to have their counterparts in the world of fact.

Scientific Materialism. - Fragments of Science, Vol. II (1879)

The brightest flashes in the world of thought are incomplete until they have been proved to have their counterparts in the world of fact.

The brightest flashes in the world of thought are incomplete until they have been proved to have their counterparts in the world of fact.

The brightest flashes in the world of thought are incomplete until they have been proved to have their counterparts in the world of fact.

The brightest flashes in the world of thought are incomplete until they have been proved to have their counterparts in the world of fact.