Irving Langmuir

The only true wisdom is in knowing you know nothing.

The unexamined life is not worth living.

The only thing necessary for the triumph of evil is for good men to do nothing.

The greatest glory in living lies not in never falling, but in rising every time we fall.

The journey of a thousand miles begins with a single step.

What we achieve inwardly will change outer reality.

The mind is everything. What you think you become.

The great difficulty in the way of adopting the atomic theory has been the apparent impossibility of forming a physical model of the atom which shall satisfy the requirements of the theory.

In scientific work, especially in physics, it is the people who start out with a definite preconceived idea that they are the ones who are likely to make the greatest advances.

The positive ions and electrons which are formed in the discharge tube are attracted to the negative and positive electrodes respectively.

Surface chemistry is the study of processes occurring at interfaces between phases.

It is the essence of scientific method that it is not dogmatic.

The adsorption of gases on solid surfaces follows a logarithmic law.

In the field of catalysis, the surface plays a predominant role.

Scientific discovery is not so much a matter of genius as of hard work and persistence.

The tungsten filament in vacuum tubes revolutionized electrical engineering.

Cloud seeding can modify weather patterns, but nature's complexity defies full control.

The beauty of science lies in its ability to explain the seemingly inexplicable.

In research, one must be prepared for the unexpected turns.

Atomic hydrogen offers immense potential for welding and industry.