Nothing tends so much to the advancement of knowledge as the application of a new instrument.

The wealth and prosperity of the country are only the comeliness of the body, the fullness of the flesh and fat; but the spirit is independent of them; it requires only muscle, bone and nerve for the true exercise of its functions. We cannot lose our liberty, because we cannot cease to think.

The most important of my discoveries have been suggested to me by failures.

Nothing tends so much to the advancement of knowledge as the application of a new instrument. The native intellectual powers of men in different times are not so much the causes of the different success of their labours, as the peculiar nature of the means and artificial resources in their possession.

Language is not only the vehicle of thought, it is a great and efficient instrument in thinking.

If I am allowed to give a metaphorical allusion to the future state of the blessed, I should imagine it by the orange-grove in that sheltered glen on which the sun is now beginning to shine, and of which the trees are at the same time, loaded with sweet golden fruit and balmy silver flowers. Such objects may well portray a state in which hope and fruition become one eternal feeling.

James Watt was equally distinguished as a natural philosopher and chemist; his inventions demonstrate his profound knowledge of those sciences, and that peculiar characteristic of genius - the union of them for practical application.