How to keep your head when all about you are losing theirs

How to keep your head when all about you are losing theirs.
Rudyard Kipling’s “If”:
…If you can keep your head when all about you are losing theirs
…If you can wait and not be tired by waiting
…If you can think – and not make thoughts your aim
…If you can trust yourself when all men doubt you
…Yours is the Earth and everything that’s in it.