The very least you can do in your life is figure out what you hope for. And the most you can do is live inside that hope. Not admire it from a distance but live right in it, under its roof.

This quote is saying that everyone should figure out and have hope for something. Once you know what it is you hope for, it is important to live that hope, not just admire it from a distance. That means you should make an effort to turn your hope into reality. It is about going beyond just having a dream and actually taking action to make it come true.