Bodies are both primordial matter and what that matter makes when it coheres. As for the primal seeds themselves no force can…

“Bodies are both primordial matter
and what that matter makes when it coheres.
As for the primal seeds themselves no force can shatter them: their solid particles survive on all onslaughts. And yet it seems hard to credit the possibility of anything in nature quite so solid.
Thunderbolts transgress the walls of houses as does the human voice and other noise; iron glows incandescent in the fire, stone splits in heat, and gold’s solidity dissolves; bronze, hard and smooth as ice, melts, overcome by flames warmth suffuses silver, cold penetrates it- we can feel them both:
let a goblet take the blood-heat of your hand then pour in water from a chilly spring.
Nothing, in fact, seems absolutely hard.
But wait; we are compelled to follow reason and the reality of things. In a few lines I will explain: there do exist solid, everlasting particles, my ‘seeds of things’, ‘primordia’, from which is built the sum of all existing things.”

–Lucretius, On the nature of things, 1.483–502 (viamyancientworld)