If there is suffering, then it's best to accept it, because it won't go away just because you pretend it's not there. If there is joy, then it's best to accept that too, even though you're afraid it might end one day.
“Defeat exists but not suffering. A true warrior knows that when he loses a battle, he is improving the skill with which he wields a sword. He will be able to fight more skillfully next time.”