philosophy

russell's paradox: can someone help me see/understand the paradox?

let's say r is a set consisting of members (physical beings) crystal, roark, dominique. in set languate, r={crystal, roark, dominique}.

i'm stumped trying to even ask the question, is the group consisting of crystal, roark, dominique a member of the group consisting of crystal, roark, dominique? is there any physical equivalence to this seemingly rhetorical Q?

the original set r consists of three individuals, physical beings. now, that is simple and straightforward. the set is an abstract entity. does it make sense to even ask, whether an abstract entity, in this case the set r, is a member of the set which is a collection of individual physical beings?

doesn't the very definition of the set r, exclude those entities or members who r not physical beings?