When it is said that heat is only the motion of certain molecules, and light the conatus recedendi [attempts… — Blaise Pascal

When it is said that heat is only the motion of certain molecules, and light the conatus recedendi [attempts to recede] which we feel, it astonishes us. ...The sensation from the fire, the warmth which affects us in a manner wholly different from touch, the reception of sound and light, all this appears to us mysterious, and yet it is material like the blow of a stone.

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