I have this habit I copied off the book "Heart" by Edmondo De Amicis[0] - whenever I hear an ambulance approaching, sirens on, I'll take my hat and earphones off, pausing for a moment as a sign of respect. Respect for the person in trouble, for the people trying to save them, and for the system that allows this to happen.

Thank you 'PuffinBlue and 'goodells for bringing this observation up. The civilization our predecessors built and to which we have privilege of contributing is, for all its failings, truly miraculous.

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[0] - https://en.wikipedia.org/wiki/Heart_(novel)