If seeing that other person's pain brings up your fear or anger or confusion (which often happens), just start doing tonglen for yourself and all the other people who are stuck in the very same way.
Pema ChodronWhat's encouraging about meditation is that, even if we shut down, we can no longer shut down in ignorance. We see very clearly that we're closing off. That in itself begins to illuminate the darkness of ignorance.
Pema Chodron