A traveler must have the back of an ass to bear all, a tongue like the tail of a dog to flatter all, the mouth of a hog to eat what is set before him, the ear of a merchant to hear all and say nothing.
There is timing in the whole life of the warrior, in his thriving and declining, in his harmony and discord. Similarly, there is timing in the Way of the merchant, in the rise and fall of capital. All things entail rising and falling timing. You must be able to discern this.