This quote is telling us that life is like a tide or wave that moves up and down. We should try to stay detached from the good and bad things that happen in our lives and accept that life can be full of highs and lows. While we should try our best to make the best of each situation, we should also remain objective and not allow ourselves to become too emotionally attached to either the good or bad. That way, life will not be as difficult to manage.