From http://www.textfiles.com/stories/emperor3.txt :

Remember that there is only one important time and that is
now. The present moment is the only time over which we have
dominion. The most important person is always the person you are
with, who is right before you, for who knows if you will have
dealings with any other person in the future? The most important
pursuit is making the person standing at your side happy, for
that alone is the pursuit of life.