There is a time to be skeptical (Ecclesiastes 3:1), and there is a time to step forward in faith. Although our world gives us many opportunities to practice doubt and skepticism, God is so completely reliable that every confrontation with Him should inspire us to step forward in faith. We don't need to hold back when we meet the Lord. We don't need to wait for further evidence. When God makes Himself known, He is all the evidence we need. Anna, and many others who encountered Jesus in the flesh, recognized God's call immediately and so did not hold back.