The meaning of this sentence is: No one can determine whether an ideal can be finally realized. The key lies in whether there are people to pursue it. If there are people to pursue it, there will be more people to pursue it. Hope, even if there is no road ahead, we can create a way; if no one pursues it. Or if only very few people pursue it, there is no hope or no greater hope.

At that time, China was in a national crisis. Many people had a pessimistic mood, believing that there was no way to save the country. Lu Xun’s words were meant to inspire people. If they persisted, even if there was no way ahead, We can still blaze a trail.

Explain that the author compares hope to the road on earth. If there is only hope without struggle, there is no hope. With hope and constant struggle, hope means nothing. People should strive hard with hope, then they will eventually usher in a new life. This sentence expresses "my" firm confidence in the coming of the new life and my persistent pursuit of a new life.