The progress of mankind is due exclusively to the progress of natural sciences, not to morals, religion or philosophy.

If you want to become a chemist, you will have to ruin your health. If you don't ruin your health studying, you won't accomplish anything these days in chemistry. Liebig's advice to Kekulé.

Chocolate is a perfect food, as wholesome as it is delicious, a beneficent restorer of exhausted power...it is the best friend of those engaged in literary pursuits.

The secret of all those who make discoveries is that they regard nothing as impossible.

Chemistry, in its application to animals and vegetables. Endeavours jointly with physiology to enlighten us respecting the mysterious processes and sources of organic life.

Observation is like a piece of glass, which, as a mirror, must be very smooth, and must be very carefully polished, in order that it may reflect the image pure and undistorted.

The more fodder, the more flesh; the more flesh, the more manure; the more manure, the more grain.

A fact acquires its true and full value only through the idea which is developed from it.

If it is impossible to judge merit and guilt in the field of natural science, then it is not possible in any field, and historical research becomes an idle, empty activity.

In the progressive growth of astronomy, physics or mechanical science was developed, and when this had been, to a certain degree, successfully cultivated, it gave birth to the science of chemistry.

In this apparatus is nothing new but its simplicity and thorough trustworthiness. On his revolutionary method of organic analysis.

There is no greater poverty, than poverty of the mind.

But for what purpose was the earth formed?" asked Candide. "To drive us mad, " replied Martin.

And I say also this. I do not think the forest would be so bright, nor the water so warm, nor love so sweet, if there were no danger in the lakes.

Bear up the hands that hang down by faith and prayer support the tottering knees. Storm the throne of grace and persevere therein and mercy will come down.

Integrity has no need of rules.

These mountains were given to us by the Great Chief so that we might never be depressed.

There are two ways of destroying a people. Either condemn them en bloc or force them to repudiate the leaders they adopted. The second is the worse.

To wait for hours to buy a train ticket or to see a doctor is accepted as a normal way of doing things. Privacy is not a great preoccupation, and this is a very crowded country.

I don't really think it matters if you go into stage or TV as long as you do a bit of character work, really.

Science doesn't care, by and large, what the answers are. It's only interested in getting the right answer. And journalism should be very much that way.