The Apostle Paul, before he was the Apostle Paul, and on his way to becoming the Apostle Paul had an encounter with the living Savior, the God-man, Jesus Christ. Luke recounts this happening in Acts of the Apostles when he writes:
9 Meanwhile Saul, still breathing threats and murder against the disciples of the Lord, went to the high priest 2 and asked him for letters to the synagogues at Damascus, so that if he found any who belonged to the Way, men or women, he might bring them bound to Jerusalem. 3 Now as he was going along and approaching Damascus, suddenly a light from heaven flashed around him. 4 He fell to the ground and heard a voice saying to him, “Saul, Saul, why do you persecute me?” 5 He asked, “Who are you, Lord?” The reply came, “I am Jesus, whom you are persecuting. 6 But get up and enter the city, and you will be told what you are to do.” 7 The men who were traveling with him stood speechless because they heard the voice but saw no one. 8 Saul got up from the ground, and though his eyes were open, he could see nothing; so they led him by the hand and brought him into Damascus. 9 For three days he was without sight, and neither ate nor drank.
Paul came to Christ through encounter with Christ; when he was confronted with the resurrected and living reality of reality Hisself. What was Paul to do in this moment? He could have still rejected the encounter, and attempted to explain it away. But the reality was so compelling and the consequences so real that his choice was, in a sense, made for him, by the One who encountered him; seemingly out of nowhere.
This brings up the issue of how God’s Self-revelation works. For Søren Kierkegaard he held that the kind of encounter the Apostle Paul had, post-ascension, is just as powerful, if not more so, as it would have been for those who actually were physically alive and walked with Jesus during his public ministry and time on earth. The reality being, that either way, what is required is that someone have eyes of faith and ears of hearing to actually appreciate who Christ is. In other words, a pure empiricism, positivism, rationalism, and/or physicalism will never suffice in providing the kind of visio required to see that Jesus Christ is the Lamb of God who takes away the sins of the world. Here is how Andrew Torrance (in his published PhD dissertation) distills Kierkegaard’s understanding:
When an immediate contemporary of Jesus would have first met him, she would have noticed nothing more than a mere human being. In his physical appearance, in the lowly form of a servant, Jesus only served to communicate a ‘teaching’: information that a person could directly apprehend for herself. Such teaching, however, as we saw in Chapter 1, can only relatively inform a person’s immanent understanding. The life of faith, by contrast, requires a person to become totally transformed through a relationship with the eternal-historical teacher, the God in time, the one who is the truth for humanity. For this reason, the object of faith is ‘not the teaching but the teacher’. Or, as Anti-Climacus puts it, ‘The helper is the help’. The Christian is primarily called to follow a person, not a standard or a principle. So, by merely observing Jesus Christ and contemplating his message, there is no direct communication of the essential truth of Christianity. For the truth to be revealed, Jesus’ appearance must serve as an occasion for God to give a person the condition for understanding the truth. God must encounter a person and draw that person into a relationship with the eternal truth that God is in himself. In Climacus’ account, it is only through the eternal-historical events of God’s self-mediation that a person is delivered into a life of faith. As such, the only purpose that the direct teaching serves is to provide an occasion, ‘an historical point of departure’, by which a person can relate consciously to the eternal truth and develop ‘the passion of faith’. This occasion, he argues, is no more accessible to the physical contemporary of the god in human form than it is to the one who comes later. Climacus writes:
Just as the historical becomes the occasion for the contemporary to become a disciple [Discipel] – by receiving the condition, please note, from the god himself (for otherwise we speak socratically) – so the report of the contemporaries becomes the occasion for everyone coming later to become a disciple – by receiving the condition, please note, from the god himself.
So, for Climacus, the person who becomes aware of the servant god through a physical encounter holds no advantage for faith over the person who comes across him via a second-hand account….
Don’t miss what’s going on here. According to A. Torrance, Kierkegaard is arguing that, for one thing, the person and work/teaching of Jesus Christ comes as a piece; with the person (eternal Logos) taking precedence, in an ontological way, over the ‘teaching’. But note, the historical teaching became and currently becomes the ‘occasion’ or point of departure wherein the encounter with the ‘Person’ takes place (think of something like Moses and the burning bush). In other words, what’s important for our purposes, is to realize that faith is not a thing, but when encounter with Christ takes place, faith comes built into that encounter, because it is a personal encounter with a real and living Person; with Jesus Christ. The encounter itself becomes the nexus from within which the bond of connection between Christ and the “encounteree” inheres. In other words, faith is contingent upon the choice of Godself to be for us in encounter with us, in the hypostatic union and mediating reality of God to human/human to God that inheres in Christ. As we meet Jesus, all that is required for that meeting to be eternally fruitful is already in place because of the character and works (for us) of the One initiating the encounter; i.e. Jesus Christ.
 Acts 9:1-9, NRSV.
 Andrew B. Torrance, The Freedom To Become A Christian: A Kierkegaardian Account of Human Transformation in Relationship with God (London: Bloomsbury T&T Clark, 2016), 78-9.