Balance.  Seek this in all things. 

Picture your see-saw with challenges at one
end and joys at the other.  Yes, you
would like to sit up high at the end with your joys at all times, but that is
not how your world operates.  Sooner or
later, you would slide down to the other end. 
It is the Law of Balance. 

And so,
you can slide back and forth from one end to the other, riding up and down,
which can be enjoyable for a while, or you can have a seat in the middle at the
balance point.  This may seem boring to
you, but it is a peaceful place to be.  You
can go there any time the ride gets too extreme.