Do not assume we are careless, because we are not the people we once were; our current state is a strange and inexplicable phenomenon.

This couplet speaks to the profound and sudden nature of change. The poet warns the listener not to be complacent about him, because the 'self' he was before is gone. He suggests that in the blink of an eye, a strange, unrecognizable state has taken over him. It is a powerful expression of disillusionment, implying that life's experiences have fundamentally altered his essence, making him a stranger even to himself.