Kipling's Hard Saying

Rudyard Kipling, in his poem "If", wrote the following:

If you can keep your head when all about you
Are losing theirs and blaming it on you;
If you can trust yourself when all men doubt you,
But make allowance for their doubting too:
If you can wait and not be tired by waiting,
Or, being lied about, don't deal in lies,
Or being hated don't give way to hating,
And yet don't look too good, nor talk too wise;

He then goes on to with an even more extensive list of things for which, if you fulfill them, you would be considered "A Man".  Kipling certainly had VERY high standards, as I have found it difficult to find men that fulfill just this small section of the poem.  How often do we lose our heads due to someone else!  Maybe if there any poem that we should keep in our memory, it is this one.