Saying that the Trough of Sorrow is hard is an understatement.
By definition it's hard.
But it's not only hard for you.
It's hard for everyone.
That means that when you experience pain, others are giving up.
It gives you the perfect opportunity to keep going.
It's a sign that you're going the right way.
That you're reaching a new level.
Relish in it.
Since success only depends on competition.
The tough parts are a sign you're outdoing them.