John 10:30
ESV - 30 I and the Father are one.
For follow-up discussion and general commentary on the topic. Comments are sorted chronologically.
Quantum mechanics has some very interesting applications to this question.
Quantum entanglement is one term this goes by. But says, once one, always one. Separation is an illusion of perception.
I think this has deep value when considering Christ becoming man and dying for us.
God bless