Avery Cardinal Dulles
In a revealed religion such as Christianity, the key question is how God comes to us and opens up a world of meaning not accessible to human investigative powers.
The answer, I suggest, is testimony. Revelation, as God’s word, is a form of divine testimony. Faith is by its nature an acceptance of the word of God, the witness who can neither deceive nor be deceived. God’s word comes to us through human witnesses: the prophets and apostles, the inspired authors of Holy Scripture, and the tradition of the Church, which faithfully passes on and interprets what it has received from Christ and the apostles.
From its beginnings Christianity has been propagated through the living testimony of believers. (The Rebirth of Apologetics)
This is missing in a lot of online apologetics. To rely solely on abstract reason is limiting. It is only a small portion of the evidence that there is for the faith. Blaise Pascal said, “The heart has its reasons of which reason knows nothing.” The reasons of the heart are vital because it is the intimate encounter with God that cannot be put into words. Cardinal Dulles is right about giving our testimony. To give our testimony is to share the reasons of the heart. It gives witness to the love of God we have through Christ our Lord.