Read "Of Those Sentiments Concerning Nature with Which Philosophers Were Delighted" by Plutarch online for free on Textopian. Full text with search, annotations, highlights, and AI-powered reading aids.
A body is that being which hath these three dimensions, breadth, depth, and length; -or a bulk which makes a sensible resistance; -or whatsoever of its own nature possesseth a place.
Plato saith that it is neither heavy nor light in its own nature, when it exists in its own place; but being in the place where another should be, then it has an inclination by which it tends to gravity or levity.