Talking about theories fulfills intellectual needs. But to get up each day, to work for what we believe in, to put our will toward accomplishment important to us - none of that is possible without hope. Hope requires a goal. If we did not have a goal to aim for, like the person searching in the word wang, we could not have hope. Hope is that belief that helps us imagine our goals and inspires us to work toward them.
Hope is also our reaction to pain.
We suffer, but in our suffering we sense that there is some way out of our pain, and we search for that opening. Thus, we are moved to find Tao, for with it comes the possibility of a better life. Have something to hope for. Make yourself into a person who can attain that hope. And when you have hope, share it with those you meet.