The theistic conclusion is that there is sufficient reason to believe that god or gods exists, or that arguments do not matter as much as the “personal witness of the holy spirit”, as argued by preeminent apologist William Lane Craig.
The Catholic Church, following the teachings of Saint Paul the Apostle, Saint Thomas Aquinas, and the First Vatican Council, which affirms that God’s existence “can be known with certainty from the created world by the natural light of human reason”.
In Christian faith, theologians and philosophers make a distinction between: (a) preambles of faith and (b) articles of faith. The preambles include alleged truths contained in revelation which are nevertheless demonstrable by reason, e.g., the immortality of the soul, the existence of God. The articles of faith, on the other hand, contain truths that cannot be proven or reached by reason alone and presuppose the truths of the preambles, e.g., the Holy Trinity, is not demonstrable and presupposes the existence of God.
The argument that the existence of God can be known to all, even prior to exposure to any divine revelation, predates Christianity. St. Paul made this argument when he said that pagans were without excuse because “since the creation of the world [God’s] invisible nature, namely, his eternal power and deity, has been clearly perceived in the things that have been made”. In this Paul alludes to the proofs for a creator, later enunciated by St. Thomas and others, but that had also been explored by the Greek philosophers.