This sign is "the road is too far, don't waste your heart", which means: the road is too difficult, the road is too far, and it is useless to have the spirit of going through all kinds of hardships. Don't be afraid of the future, which means: don't just see the immediate difficulties, just do nothing with your heart. Without real fame, people are just like mortals, that is, without real kung fu (knowledge).
It's no use.