Yet ar ther fibicches in forceres
Of fele raennes makyng,
Experimentz of alkenamye
The peple to deceyve;
If thow thynke to do-wel,
Deel therwith nevere.
There are many men, also, who makes use of strange devices,
Alchemical experiments for the deception of others:
If you desire to do well, have no dealings with these.

Always deal from strength, never from weakness.

I should study Nature’s laws in all their crossings and unions; I should follow magnetic streams to their source and follow the shores of our magnetic oceans. I should go among the rays of the aurora, and follow them to their beginnings, and study their dealings and communications with other powers and expressions of matter.

In physics we deal with states of affairs much simpler than those of psychology and yet we again and again learn that our task is not to investigate the essence of things—we do not at all know what this would mean&mash;but to develop those concepts that allow us to speak with each other about the events of nature in a fruitful manner.

Jupiter’s passed through Orion
And come into conjunction with Mars.
Saturn is wheeling through infinite space
To its preordained place in the stars.
And I gaze at the planets in wonder
At the trouble and time they spend,
All to warn me to be careful
In dealings involving a friend!

Science, which deals with the infinite, is itself without bounds.

The fundamental characteristic of the scientific method is honesty. In dealing with any question, science asks no favors. ... I believe that constant use of the scientific method must in the end leave its impress upon him who uses it. ... A life spent in accordance with scientific teachings would be of a high order. It would practically conform to the teachings of the highest types of religion. The motives would be different, but so far as conduct is concerned the results would be practically identical.

The point of mathematics is that in it we have always got rid of the particular instance, and even of any particular sorts of entities. So that for example, no mathematical truths apply merely to fish, or merely to stones, or merely to colours. So long as you are dealing with pure mathematics, you are in the realm of complete and absolute abstraction. … Mathematics is thought moving in the sphere of complete abstraction from any particular instance of what it is talking about.

To the Victorian scientist, science was the pursuit of truth about Nature. In imagination, each new truth discovered could be ticked off on a list kept perhaps in a celestial planning office, so reducing by one the total number of truths to be discovered. But the practising scientist now knows that he is dealing with a living, growing thing. His task is never done.

Why does man behave like perfect idiot? This is the problem I wish to deal with.

Years ago I used to worry about the degree to which I specialized. Vision is limited enough, yet I was not really working on vision, for I hardly made contact with visual sensations, except as signals, nor with the nervous pathways, nor the structure of the eye, except the retina. Actually my studies involved only the rods and cones of the retina, and in them only the visual pigments. A sadly limited peripheral business, fit for escapists. But it is as though this were a very narrow window through which at a distance, one can only see a crack of light. As one comes closer the view grows wider and wider, until finally looking through the same narrow window one is looking at the universe. It is like the pupil of the eye, an opening only two to three millimetres across in daylight, but yielding a wide angle of view, and manoeuvrable enough to be turned in all directions. I think this is always the way it goes in science, because science is all one. It hardly matters where one enters, provided one can come closer, and then one does not see less and less, but more and more, because one is not dealing with an opaque object, but with a window.