001 And Saul, while he yet spake against the disciples of the Lord, with threats and murders, went to the high priest, and besought him to send letters to Damascus unto the synagogues, that, if he found any that way, both men and women, he might bring them bound to Jerusalem. And as he went, he came near Damascus, and suddenly there looked upon him a light from heaven, and fell upon the earth; and he heard a voice saying unto him, Saul, Saul, why persecutest thou me? And he said, Lord, who art thou? And the Lord said: I am Jesus, whom thou persecutest. It shall be hard for thee to lick against the sting. And he said with fear and trembling, Lord, what wilt thou that I should do? And the Lord said unto him, Arise, and go into the city, and they shall tell thee what thou shalt do.
(2) The men who were his companions stood still and were frozen, because they heard a voice and saw no one. But Saul arose from the earth, and when he opened his eyes, he saw no one. They took him by the hand and led him to Damascus, and for three days he did not see, nor eat, nor drink.
3 Now there was a disciple in Damascus, named Ananias, to whom the Lord said in a vision, Anania. And he said, Here am I, Lord. And the Lord said unto him, Arise, and go into the street which is called Right, and inquire of the house of Judah for Saulo, whose name is Tarsen: for, behold, he prayeth, and hath seen in a vision a man, whose name is Ananias, coming in unto him, and laying his hand upon him, that he may receive his sight.
004 And Ananias answered, Lord, I have heard of many concerning this man, how much evil he hath done unto thy saints in Jerusalem; and he hath power here of the chief priests to bind all them that call upon thy name. The Lord said to him, "Go, for this man is my chosen armor, that he may bear my name before the Gentiles, and before kings, and before the children of Israel; I will show him how much he must suffer for my name's sake.
005 And Ananias went and entered into the house, and laid his hands upon him, and said, Brother Saul, the Lord hath sent me, which appeared unto thee by the way, that thou mightest receive thy sight, and be filled with the Holy Ghost. And immediately the scales fell from his eyes, and he recovered his sight, and arose, and was baptized, and took meat, and strengthened himself.
(6) Saul was with the disciples at Damascus for some days, and immediately he preached Christ in the synagogues, saying that he was the Son of God. But all who heard it were amazed and said: Is not this he that put away at Jerusalem all them that call upon this name, and come hither to bring them bound unto the chief priests? But Saul grew stronger and stronger, and drove in the Jews who lived in Damascus, proving that this is the Christ.
This is the history of today's feast; if you want to read more about St. Paul, read the history of the apostles and his epistles.