By stretching forth thine hand ... - The apostles not only desired boldness to speak, but they asked that God would continue to work miracles, and thus furnish to them, and to the people, evidence of the truth of what they delivered. They did not even ask that he would preserve their lives, or keep them from danger. They were intent on their work, and they confidently committed their way to God, making it their great object to promote the knowledge of the truth, and seeking that God would glorify himself by establishing his kingdom among people.
Signs and wonders - Miracles. (See the notes on Acts 2:43.