The mind of the ordinary man is in so imperfect a condition that it requires a creed; that is to say, a theory concerning the unknown and the unknowable in which it may place its deluded faith and be at rest. Science, then, commands our respect, not on the basis that its present assumptions and deductions are absolutely and for all time true, but on the ground that its method is for all time truethe method of discovery, the method of observation, research, experimentation, comparison, examination, testing, analysis and synthesis.