Experiment is the only means of knowledge at our disposal. Everything else is poetry, imagination.

The only source of knowledge is experience.

The true method of knowledge is experiment.

Did you know: The only source of knowledge is experience

Experiments are the only means of knowledge at our disposal. The rest is poetry, imagination.

Experiment is the sole judge of scientific “truth.” But what is the source of knowledge? Where do the laws that are to be tested come from? Experiment, itself, helps to produce these laws, in the sense that it gives us hints. But also needed is imagination to create from these hints the great generalizations — to guess at the wonderful, simple, but very strange patterns beneath them all, and then to experiment to check again whether we have made the right guess. This imagining process is so difficult that there is a division of labor in physics: there are theoretical physicists who imagine, deduce, and guess at new laws, but do not experiment; and then there are experimental physicists who experiment, imagine, deduce, and guess.

Agreement with experiment is the sole criteria of truth for a physical theory.

Experience is the only source of wisdom: by which I mean, the competent conduct of life.

Each piece, or part, of the whole of nature is always merely an approximation to the complete truth, or the complete truth so far as we know it. In fact, everything we know is only some kind of approximation, because we know that we do not know all the laws as yet. Therefore, things must be learned only to be unlearned again or, more likely, to be corrected. ... The test of all knowledge is experiment. Experiment is the sole judge of scientific “truth”.

Knowledge can only be got in one way, the way of experience; there is no other way to know.

Experience is the only prophecy of wise men.

Truth is what stands the test of experience.

We must trust to nothing but facts: These are presented to us by Nature, and cannot deceive. We ought, in every instance, to submit our reasoning to the test of experiment, and never to search for truth but by the natural road of experiment and observation.

Experience presents itself as the method, and the only method, for getting at nature, penetrating its secrets, and wherein nature empirically discloses (by the use of empirical method in natural science) deepens, enriches and directs the further development of experience.