What Heaven has conferred is called The Nature; an accordance with this nature is called The Path of duty; the regulation of this path is called Instruction. The path may not be left for an instant. If it could be left, it would not be the path.
To be constantly without desire is the way to have a vision of the mystery of heaven and earth. For constantly to have desire is the means by which their limitations are seen.
CLEOPATRA: If it be love indeed, tell me how much. ANTONY: There's beggary in the love that can be reckoned. CLEOPATRA: I'll set a bourne how far to be belov'd. ANTONY: Then must thou needs find out new heaven, new earth.