“Miracles are, therefore, in Luke’s understanding of the matter, part and parcel of the entire mission of witness. The whole is miraculous, in so far as it is a continuous mighty work of God. By the divine power the gospel is preached, converts are made, the Church is established in unity and brotherhood, the opposing powers, whether human or demonic are conquered… The whole mission …[is]… effected by supernatural power, whether in the guidance given to the missionaries, in their dramatic release from prison or deliverance from enemies or shipwreck, or in the signs of healing and raising the dead… It is consequently difficult to pick out the miraculous from the non-miraculous in Luke’s story.
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— G.W.H. Lampe, “Miracles in the Acts of the Apostles” in Miracles: Cambridge Studies in Their Philosophy and History, (1965), p.173. I first came across this in Ben Witherington III's, The Acts of the Apostles: A Socio-Rhetorical Commentary, p. 233.