James Watt

My principal object is to economize heat.

Nature is very consonant and conformable with herself.

The world is very different now. For man holds in his mortal hands the power to abolish all forms of human poverty.

Improvement in machinery is as much a part of the natural progress of society as improvement in knowledge.

I have always considered the steam engine as the greatest of all my inventions.

Let the paths of glory be those of usefulness.

The condensation of steam is a most important operation.

Genius is no more than knowing how to use your time.

I never suffered a day to pass without doing something.

The rotary motion is the soul of machinery.

What is wanted is not a new engine, but a better one.

Time is the most valuable thing a man can spend.

The double-acting engine is a great step forward.

Invention requires patience and perseverance.

The indicator is my favorite invention.

Man's power over nature increases with his knowledge.

I owe much to the thermometer.

The parallel motion is elegant and simple.

Life is too short for idle pursuits.

Steam is the monarch of motive powers.