The true worth of an experimenter consists in his pursuing not only what he seeks in his experiment, but also what he did not seek.
Experiment is fundamentally only induced observation.
We must never make experiments to confirm our ideas, but simply to control them.
Il ne fallait jamais faire des expériences pour confirmer ses idées, mais simplement pour les contrôler. We must never make experiments to confirm our ideas, but simply to control them.