Buddha said: There is no limit to the sea of suffering, and turning back is the shore. That is, there is no limit, where is the shore?

This is a double hypothesis, which includes two independent hypotheses. The first hypothesis is that if you cling to the sea of misery, you will be immersed in it, and there will be no end to it. The second hypothesis is that if you wake up suddenly, there will be a shore everywhere, and you can leave it anytime and anywhere. The subject determines the situation, not the sea and shore of the unchangeable geographical concept, but the heart and the shore.