“It is difficult to estimate the misery inflicted upon thousands of persons, and the absolute pecuniary penalty imposed upon multitudes of intellectual workers by the loss of their time, destroyed by organ-grinders and other similar nuisances.”

An object is frequently not seen, from not knowing how to see it, rather than from any defect of the organ of vision.

In turning from the smaller instruments in frequent use to the larger and more important machines, the economy arising from the increase of velocity becomes more striking.

The difference between a tool and a machine is not capable of very precise distinction; nor is it necessary, in a popular explanation of those terms, to limit very strictly their acceptation.

That science has long been neglected and declining in England, is not an opinion originating with me, but is shared by many, and has been expressed by higher authority than mine.

The tastes and pursuits of manhood will bear on them the traces of the earlier impressions of our education. It is therefore not unreasonable to suppose that some portion of the neglect of science in England, may be attributed to the system of education we pursue.

The first steps in the path of discovery, and the first approximate measures, are those which add most to the existing knowledge of mankind.

I have no desire to write my own biography, as long as I have strength and means to do better work.

The errors which arise from the absence of facts are far more numerous and more durable than those which result from unsound reasoning respecting true data.

Errors using inadequate data are much less than those using no data at all.

There are few circumstances which so strongly distinguish the philosopher, as the calmness with which he can reply to criticisms he may think undeservedly severe.

No person will deny that the highest degree of attainable accuracy is an object to be desired, and it is generally found that the last advances towards precision require a greater devotion of time, labour, and expense, than those which precede them.

Some kinds of nails, such as those used for defending the soles of coarse shoes, called hobnails, require a particular form of the head, which is made by the stroke of a die.

Whenever a man can get hold of numbers, they are invaluable: if correct, they assist in informing his own mind, but they are still more useful in deluding the minds of others. Numbers are the masters of the weak, but the slaves of the strong.

What is there in a name? It is merely an empty basket, until you put something into it.

For one person who is blessed with the power of invention, many will always be found who have the capacity of applying principles.

At each increase of knowledge, as well as on the contrivance of every new tool, human labour becomes abridged.