Trials keep you strong .
Sorrow keeps you human.
Failure keeps you humble.
Courage keeps you going ."
Life cannot be categorized as all about strength, happiness or trials etc. The key is balance, which is what this quote talks about. Happiness and joy to keep you sweet and away from bitterness. Trials to keep you strong. Sorrow to keep it real. Failure to keep you from arrogance and courage to make it through all these things and everything else life will throw at you.