Well, I suppose it could mean many things. It's really open for people to interpret it for themselves. But it could mean that hope can come from outside you, like for some people things they love like art, music, and other hobbies are hope for them. Others, it could be family, friends, loved ones, religion, really it could be anything. But I like to think that the person in the image has seen hope for the future and though it kinda comes from without, knowing that things change and things get better is making them find the other things inside of them that give them hope, strength and courage to carry on, which is why the person is exuding the same light as hope. But again, this is open for anyone to interpret it in a way that (hopefully) gives them hope.
If that makes sense |D