For any of us who have been through a trauma that removed us from a place of happiness, this quote is for us. Suddenly we are thrown into a place of unhappiness with no plan of how to escape. We may not be able to return to the happiness we had known, but we can strive to be less sad or strive, in other words, strive to be happy in a different way.
This is possible. I know because I have been there.
God Bless You On Your Journey!