Life without hope can be very meaningless. One of the reasons most people die before their time is because of hopelessness, they didn't have something or someone important in their lives to make them feel important and optimistic about what tommorow would bring.
When you have hope, you have a reason to live for tommorow. High level of hope can bring up high energy and youthfulness in you. Have you ever why wondered why women are always happy when a man proposed to them? It is because the proposal brings hope to them, making them feel positive about the future of having a lovely, caring and happy family. And also the reason why men cry when their proposal is being rejected, is because the rejection has cut off the hope of expecting to start a family and be happy in the future.
Even in your professional life, relationships or friendships, somethings can just kill your hope. When you are working on a job that doesn't give you hope for tommorow, your today will always be filled with anxiety and overthinking which is not good for you, those worries can shorten your lifestyle.
Always revolve your world around something or people that gives you hope, because that is what makes you live and look forward for tomorrow. It is only the hopeless that lives with too much worries and overthinking all the days of their lives.
Whatever life has done to you, be hopeful so that you can live for tommorow.