2.19 But the ideas that you have, 'Bhisma and others are neing killed by me in war; I am surely their killer'  this idea of yours is false. How? Yah, he who; vetti, thinks; of enam, this One, the embodied One under consideration; as hantaram, the killer, the agent of the act of killing; ca, and; yah, he who, the other who; manyate, thinks; of enam, this One; as hatam, the killed  (who thinks) 'When the body is killed, I am myself killed; I become the object of the act of killing'; ubhau tau, both of them; owing to non-discrimination, na, do not; vijanitah, know the Self which is the subject of the consciousness of 'I'. The meaning is: On the killing of the body, he who thinks of the Self ( the content of the consciousness of 'I' ) [The Ast. omits this phrase from the precedig sentence and includes it in this place. The A.A. has this phrase in both the places.-Tr.] as 'I am the killer', and he who thinks, 'I have been killed', both of them are ignorant of the nature of the Self. For, ayam, this Self; owing to Its changelessness, na hanti, does not kill, does not become the agent of the act of killing; na hanyate, nor is It killed, i.e. It does not become the object (of the act of killing).
The second verse is to show how the Self is changeless: