False facts are highly injurious to the progress of science, for they often endure long; but false views, if supported by some evidence, do little harm, for every one takes a salutary pleasure in proving their falseness.

It can scarcely be denied that the supreme goal of all theory is to make the irreducible basic elements as simple and as few as possible without having to surrender the adequate representation of a single datum of experience.

The most beautiful experience we can have is the mysterious. It is the source of all true art and science.

All sciences are vain and full of errors that are not born of Experience, the mother of all Knowledge.

We are certainly not to relinquish the evidence of experiments for the sake of dreams and vain fictions of our own devising; nor are we to recede from the analogy of Nature, which is wont to be simple and always consonant to itself.

Scientific truth is always paradox, if judged by everyday experience, which catches only the delusive appearance of things.