stop creating future

when some one insults you, the attitude of a witness.of a person who is practising non attachment,i must have insulted him before,in some past life some where, because nothing is born with out a cause.The cause must be there, this is only effect.So i must wait and take it ,accept is as part of my destiny and be finished with it,because if i do something again a new future is created and the chain continues. someone insults you.If you answer in any way then the account is not closed,it remained open.If you dont respond then the account is closed.When accounts are closed you need not be reborn again, you simply disappear from this philosophy and phenomenal world from this world from this physical world.Then you exist as cosmos.