Philip ran up and heard him reading the prophet Isaiah. “Do you really understand what you are reading?” he asked.
In context
28He was on his way home, sitting in his chariot and reading the prophet Isaiah. 29The Spirit said to Philip, “Go over and stay close to that chariot.” 30Philip ran up and heard him reading the prophet Isaiah. “Do you really understand what you are reading?” he asked. 31“How could I,” the man said, “unless someone guides me?” And he invited Philip to climb up and sit with him. 32The passage of Scripture he was reading was this: ‘Like a sheep he was led to the slaughter, and like a lamb silent before its shearer, so he does not open his mouth.