When they saw the courage of Peter and John and realized that they were unschooled, ordinary men, they were astonished and took note that these men had been with Jesus.
Peter and John had already been blessed with the Holy Spirit, which gave them all of the courage they needed to move forward with boldness. I am seeing their "boldness" as a combination of courage and confidence. And for me, the message here is in the first part of the verse: "unschooled, ordinary men". I am afraid I sometimes equate education and schooling with wisdom, and this cuts me off from the wisdom of many whose faith is strong simply due to their love for God and their efforts to seek Him.
Holy Lord, help me to continue to learn from others whose faith is strong. Amen