Stephen accused the people of being stiff-necked with uncircumcised hearts and ears. This means they were strong-willed and ignored God's truth. This was exactly how God had accused them of behaving during the time of wilderness wandering. Here, Stephen links it to rejecting the gospel and resisting the Holy Spirit (see Exodus 32:9; 33:3; 34:9; Deuteronomy 9:6, 13; 31:27; see also Psalm 78:8; Zechariah 7:11–12).