Heat can also be produced by the impact of imperfectly elastic bodies as well as by friction. This … - Hermann von Helmholtz

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Those who expect moments of change to be comfortable and free of conflict have not learned their history.

Hermann von Helmholtz

Heat can also be produced by the impact of imperfectly elastic bodies as well as by friction. This is the case, for instance, when we produce fire by striking flint against steel, or when an iron bar is worked for some time by powerful blows of the hammer.

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All that science can achieve is a perfect knowledge and a perfect understanding of the action of natural and moral forces.

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The originator of a new concept. . . finds, as a rule, that it is much more difficult to find out why other people do not understand him, than it was to discover the new truth.

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Music stands in a much closer connection with pure sensation than any of the other arts.

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When young Galileo, then a student at Pisa, noticed one day during divine service a chandelier swinging backwards and forwards, and convinced himself, by counting his pulse, that the duration of the oscillations was independent of the arc through which it moved, who could know that this discovery would eventually put it in our power, by means of the pendulum, to attain an accuracy in the measurement of time till then deemed impossible, and would enable the storm-tossed seaman in the most distant oceans to determine in what degree of longitude he was sailing?

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Whoever, in the pursuit of science, seeks after immediate practical utility, may generally rest assured that he will seek in vain.

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