Nothing is to wonderful to be true.

There is no more open door by which you can enter into the study of natural philosophy than by considering the physical phenomena of a candle

When I consider the multitude of associated forces which are diffused through nature - when I think of that calm balancing of their energies which enables those most powerful in themselves, most destructive to the world's creatures and economy, to dwell associated together and be made subservient to the wants of creation, I rise from the contemplation more than ever impressed with the wisdom, the beneficence, and grandeur, beyond our language to express, of the Great Disposer of us all.

I am no poet, but if you think for yourselves, as I proceed, the facts will form a poem in your minds.

Speculations? I have none. I am resting on certainties.

Chemistry is necessarily an experimental science: its conclusions are drawn from data, and its principles supported by evidence from facts.

There’s nothing quite as frightening as someone who knows they are right.