Shared ground
Eliphaz presents his counsel as supported by a private, unsettling experience. The text’s explicit claims are about how the “message” came: secretly, like a whisper, in the setting of night visions and deep sleep, accompanied by overwhelming fear (trembling, bones shaking, hair standing up). A “spirit” passes, an indistinct “form” remains, there is silence, and then a voice begins to speak.
Within Job’s larger argument, the passage shows one way a friend tries to gain authority: appealing to an intense personal encounter rather than only general observations. The scene also highlights how fear and mystery can accompany what a person takes to be revelation.
Where interpretation differs
Some readers take the “spirit” and “voice” as an external supernatural being delivering a real message to Eliphaz. Others read the description as dream-vision imagery—an inward experience (still meaningful to Eliphaz) shaped by the night-vision setting and the body’s fear response.
A second, smaller difference is how to weigh the message’s authority. Many see Eliphaz as sincerely reporting something he believes is from God. Others stress that the book as a whole later challenges the friends’ conclusions, so the narrative may be showing how impressive experiences can be used to support claims that are not fully reliable.
Why the disagreement exists
The passage itself mixes “night visions,” “deep sleep,” and sensory detail (whisper, hair standing up, silence, then a voice). That blend can fit either (1) an objective visitation described with poetic language, or (2) a powerful dreamlike encounter described as if it were happening in the room. Also, these verses stop right as the voice begins; readers often evaluate the experience partly by what the voice says next (vv. 17–21), and by how Job later responds to the friends overall.
What this passage clearly contributes
Eliphaz is grounding his coming argument in an experience he frames as confidential and awe-inducing: that came “secretly,” at night, producing terror, involving a “spirit/form,” followed by silence and then speech (Job 4:12; Job 4:16). Whatever one concludes about its source, the text clearly depicts the rhetorical force of such experiences inside the book: they can sound authoritative, feel compelling, and yet still require careful evaluation within Job’s wider debate about suffering and truth.