"The Spirit's speaking to Peter should not be construed as a private existential experience. The Spirit directed Peter because he was the means to which the Gentiles would hear the Gospel. The point of the story is not the Spirit's private revelation to Peter. The Spirit speaks to Peter so that he will bring the gospel to the nations".
Thomas R Schreiner - "New Testament Theology - Magnifying God in Christ" - Apollos, Nottingham (2008) - (p445-6).