I think your thread was closed by FI... maybe she thinks you
aren't sincere in asking, not sure.
In Buddhism, we do not aim to become like a stone. We aim to
realize our wisdom, so that we can be more aware in our lives....
so that we can be liberated even while we are living.
If you are liberated and happy in your life, you don't need to
seek an afterlife state.
Nevertheless, it is true that through Buddhist practice one can
achieve the liberation from endless rebirth in samsara. If your aim
is Arhatship, that is where you stop, for the Bodhisattvas they
continue practicing to Buddhahood for the sake of delivering
countless sentient beings still suffering.