August Wilhelm von Hofmann quotes:

I would trade all my experimental works for the single idea of the benzene theory.

I will listen to any hypothesis but on one condition-that you show me a method by which it can be tested.

Instead of disbursing her annual millions for these dye stuffs, England will, beyond question, at no distant day become herself the greatest coloring producing country in the world; nay, by the very strangest of revolutions she may ere long send her coal-derived blues to indigo-growing India, her tar-distilled crimson to cochineal-producing Mexico, and her fossil substitutes for quercitron and safflower to China, Japan and the other countries whence these articles are now derived.