Black is real sensation, even if it is produced by entire absence of light. The sensation of black is distinctly different from the lack of all sensations.
Interpretation
Black represents a unique sensory experience, separate from the absence of light, emphasizing the complexity of perception.
In this quote, Hermann Von Helmholtz explores the concept of black not merely as the absence of light but as a distinct sensation in itself. He suggests that our perception of colors and sensations is intricate and that even the perception of 'black', often associated with the absence of light, produces a unique sensory experience that cannot be equated with a complete lack of sensation.
In practice
In a discussion about the nature of perception in an art class.
The total quantity of all the forces capable of work in the whole universe remains eternal and unchanged throughout all their changes. All change in nature amounts to this, that force can change its form and locality, without its quantity being changed. The universe possesses, once for all, a store of force which is not altered by any change of phenomena, can neither be increased nor diminished, and which maintains any change which takes place on it.
Isolated facts and experiments have in themselves no value, however great their number may be. They only become valuable in a theoretical or practical point of view when they make us acquainted with the law of a series of uniformly recurring phenomena, or, it may be, only give a negative result showing an incompleteness in our knowledge of such a law, till then held to be perfect.
Whoever, in the pursuit of science, seeks after immediate practical utility, may generally rest assured that he will seek in vain.
We send missionaries to China so the Chinese can get to heaven, but we won't let them into our country.
Nobody seriously believes the universe was made by God without being persuaded that He takes care of His works.
Had drugs been decriminalized, crack would never have been invented and there would today be fewer addicts... The ghettos would not be drug-and-crime-infested no-man's lands... Colombia, Bolivia and Peru would not be suffering from narco-terror, and we would not be distorting our foreign policy because of it.
I don't care how nice one is to you, the thing you must always remember is that almost never does he really see you as he sees himself, as he sees his own kind.
Liberty of thought is the life of the soul.
The story of my life is about back entrances, side doors, secret elevators and other ways of getting in and out of places so that people won't bother me.
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