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.
All religions and cultures suffer from sources that preach hate against the 'other.' Throughout history some have, tragically, practiced what their sources preached, while some have sought to dismiss or even counteract the hateful words of their sources.
A man in a desert can hold absence in his cupped hands, knowing it is something that feeds him more than water.
I have often seen people uncivil by too much civility, and tiresome in their courtesy.
True karate is this: that in daily life one's mind and body be trained and developed in a spirit of humility, and that in critical times, one be devoted utterly to the cause of justice.
Reason speaks and feeling bites
Some of us still get all weepy when we think about the Gaia Hypothesis, the idea that earth is a big furry goddess-creature who resembles everybody's mom in that she knows what's best for us. But if you look at the historical record - Krakatoa, Mt. Vesuvius, Hurricane Charley, poison ivy, and so forth down the ages - you have to ask yourself: Whose side is she on, anyway?
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