Harming none, not even yourself

samaṃ paśyanhi sarvatra samavasthitamīśvaramna hinastyātmanātmānaṃ tato yāti parāṃ gatim

Seeing the same Lord present everywhere, one does not harm the Self by the self, and so reaches the highest goal.

What it means

Krishna draws the consequence. When you see the same Lord everywhere, you stop harming the Self, in yourself and in others, because it's the same Self. Unkindness to anyone becomes unkindness to yourself. Seeing this way leads to the highest goal.

The story

Arjuna is learning that even in battle, he must act without hatred. If he sees the same Self in his opponents, he can do his duty without cruelty.

In your life

Imagine someone who stops gossiping after realising every cruel word hurt them too. Speak of someone absent today the way you'd want to be spoken of.