People of sound reason readily distinguish, in many cases, between judgments, statements, and descriptions concerning each individual member and those concerning the whole.
You affirm the existence of the indivisible atom. According to you, each constituent part of a body is an indivisible atom, yet the body itself is not an indivisible atom; rather, it is an aggregate of individual atoms. Thus, certain properties belong to the aggregate that do not belong to the individual atom.
Conversely, a human being as a whole is human, but not every organ is a human being.
Likewise, the sun and the moon, trees and fruit, and other composite bodies have properties and descriptions that do not apply to their constituent parts.
A human being is alive and can hear, see, and speak, but not every part of the human body is like this.
Why, then, should it follow that, if the kind and the aggregate endure perpetually, each individual member must also endure perpetually?
Geometrical and numerical entities—such as spheres, circles, lines, triangles, squares, thousands, and hundreds—all have parts to which properties apply that do not apply to the whole.
Conversely, describing something as perpetual, long, or extended does not entail that each of its parts or individual members is likewise.
Allah Most High says concerning Paradise:
“Its fruit is everlasting, and so is its shade.”
Al-Raʿd: 35.
It is well known that every portion of its fruit and shade perishes and comes to an end, while the kind endures, neither perishing nor coming to an end. The parts are not described in the same terms as the whole.