Acts 9:3-9 (ESV): "Now as he went on his way, he approached Damascus, and suddenly a light from heaven shone around him. And falling to the ground he heard a voice saying to him, 'Saul, Saul, why are you persecuting me?'
"And he said, 'Who are you, Lord?'
"And he said, 'I am Jesus, whom you are persecuting. But rise and enter the city, and you will be told what you are to do.'
"The men who were traveling with him stood speechless, hearing the voice but seeing no one. Saul rose from the ground, and although his eyes were opened, he saw nothing. So they led him by the hand and brought him into Damascus. And for three days he was without sight, and neither ate nor drank."
John Bunyan (see Bookmark for page 78) was converted after years of struggle, first as a notorious sinner and then as a "painted hypocrite" when "one day, as he was passing into [a] field, these words fell upon his soul, 'Thy righteousness is in heaven.' The eyes of his soul saw at the same time that Jesus Christ was at God's right hand, and 'there,' he said, 'is my righteousness. I saw, moreover, that it was not my good frame of heart that made my righteousness better, nor my bad frame that made my righteousness worse; for my righteousness was Jesus Christ Himself, "the same yesterday, today and forever"' (Heb. 13:8)." For an interesting and readable account of Bunyan's spiritual struggles, see The Conversion of John Bunyan.