Observation is a passive science, experimentation an active science. – Claude Bernard
A fact in itself is nothing. It is valuable only for the idea attached to it, or for the proof which it furnishes. – Claude Bernard

Observation is a passive science, experimentation an active science. – Claude Bernard
A fact in itself is nothing. It is valuable only for the idea attached to it, or for the proof which it furnishes. – Claude Bernard
In what bold relief stand out the lives of all walkers of the snow! The snow is a great tell-tale, and blabs as effectually as it obliterates. I go into the woods, and know all that has happened. I cross the fields, and if only a mouse has visited his neighbor, the fact is chronicled. – John Burroughs, “The Snow-Walkers,” 1866