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

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.

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.

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

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.

Feelings will come and go, but you are always responsible for your actions.

Professional learning does not advance… through the inexorable confirmation of previous certainties, but through a systematic challenge to our present conceptions

Guard, O my soul, against pomp and glory. And if you cannot curb your ambitions, at least pursue them hesitantly, cautiously. And the higher you go, the more searching and careful you need to be.

We love your adherence to democratic principles and to democratic processes.

The whole universe sat there, open to the man who could make the right decisions.

You and I might define a 'soul mate' differently. For most people, a soul mate has some kind of sexual connotation.

These people are trying to shake the will of the Iraqi citizens, and they want us to leave...I think the world would be better off if we did leave.

I think we need a big national dance.

Details are the Life of Prose.

What is a logical mind?... It is the antiseptic which destroys the bacilli of unreason whereby true happiness is vivified.