The author here expresses the motto of survival in the battle of life. All cannot win this battle, but those who win acquired through war only. So happiness is not possible in this world without war. Let's think about the unsuccessful people, after losing the battle of life, many become frustrated and lose. Others turn around even after losing and engage in new tactics and new struggles. Until success comes they struggle. In my opinion, these are really strong personalities because a lot of experience is gained from them. Since life is a cruise ship, it is also an indispensable element of struggle. So we should not give up on it. So I'm in the same opinion as to the author.
Believe in the existence of God the superpower.