레위기 25:28의 Musar

The second type of prophetic visions which G–d employed to communicate with other prophets, חידות, riddles, are mentioned to indicate that the visions were not as clear. G–d also employed parables and images. All this was required because the prophets in question needed to be separated from the origin of the Divine vision by one or several layers of screens. It is this latter type of prophetic insights that G–d refers to in the verse quoted from Hoseah. When G–d added (Hoseah 12,11) וביד הנביאים אדמה, "I would appear in different guises to the prophets," the meaning is that each prophet was granted the level of communication he could absorb without suffering harm from exposure to G–d's proximity. The reason G–d (the prophet) employs the word יד, is an allusion to אם לא תמצא ידה, "If she (the mother who has just given birth and is required to bring an offering) cannot afford it." (Leviticus 12,8).