[Torrere]

Originally posted by DanaC

umm....I think physicists do actually...

Wikipedia:
It's important to understand that while Newton was able to formulate his law of gravity in his monumental work, he was not comfortable with it because he never, in his words, "assigned the cause of this power." In all other cases, he used the phenomenon of motion to explain the origin of various forces acting on bodies, but in the case of gravity, he was unable to experimentally identify the motion that produces the force of gravity. Moreover, he refused to even offer a hypothesis as to the cause of this force on grounds that to do so was contrary to sound science.

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If science is eventually able to discover the cause of the gravitational force, Newton's wish could eventually be fullfiled as well.