Put off your imagination, as you put off your overcoat, when you enter the laboratory. Put it on again, as you put on your overcoat, when you leave. – 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
It is what we know already that often prevents us from learning. – Claude Bernard
The doubter is a true man of science; he doubts only himself and his interpretations, but he believes in science. – Claude Bernard
I think the true gardener is a lover of his flowers, not a critic of them. I think the true gardener is the reverent servant of Nature, not her truculent, wife-beating master. I think the true gardener, the older he grows, should more and more develop a humble, grateful and uncertain spirit. – Reginald Farrer, In a Yorkshire Garden, 1909