[this is a sample of text from the book “Living on the edge” by Jonathan Burke]
Is faith rational?
‘Faith is confidence for a reason. Everyone understands faith in this sense, as applied to ordinary matters. It is the same in divine matters. There is no truth in the popular view that places faith outside the confines of reason.’
A typical dictionary definition rightly informs us that faith is belief which is not based on proof. However, this is not the same as saying faith is blind, or that faith is belief for no reason, or that faith is not based on evidence.
Proof is a body of evidence which demonstrates a belief or statement to be conclusively true (typically through testing); evidence is a body of facts which provide rational reason for belief, without being conclusive. Faith is belief on the basis of evidence, where actual proof is absent.
There are many aspects of our faith which we cannot prove: we cannot prove the existence of many of the characters of the Bible, and many of the events recorded there; we cannot prove the resurrection took place; we cannot even prove the existence of God.
In each of these cases we have no opportunity to test the claim and prove it conclusively. However, in each of these cases there is sufficient evidence to warrant belief. We do not hold these beliefs without any evidence whatsoever. Throughout the Bible repeated appeals are made repeatedly to evidence, in support of truth claims; eyewitness accounts,  verifiable historical monuments, and direct personal experiences. Blind faith is never encouraged.  
Early Christians appealed to evidence in order to argue that their faith was rational. Accordingly, the earliest defenders of Christianity (known as the Apologists), presented it as rational and worthy of belief, and in harmony with science, which appealed to thoughtful non-Christians.
The 4th century Latin commentary known by the name ‘Ambrosiaster’, identifies prophecy as ‘the first proof that our faith is rational’. The famous 13th century theologian Thomas Aquinas likewise argued that faith is rational and that reason could be used to demonstrate theological truths. Christian belief, if it is to be both rational and defensible, must be based on a faith which is not blind. 
‘The certainty of and trust in the Christian faith cannot be made hard in a scientific, deductive or inductive way. But neither is it based on arbitrary opinion.’
 Roberts, ‘The Visible Hand of God Or Miracles, Signs, And Wonders’, The Christadelphian (18.199.16), 1881.
 ‘1 complete trust or confidence. 2 strong belief in a religion, based on spiritual conviction rather than proof.’, Concise Oxford English Dictionary (11th ed. 2004).
 John 3:11 I tell you the solemn truth, we speak about what we know and testify about what we have seen, but you people do not accept our testimony.
 Acts 5:30 The God of our forefathers raised up Jesus, whom you seized and killed by hanging him on a tree. 31 God exalted him to his right hand as Leader and Savior, to give repentance to Israel and forgiveness of sins. 32 And we are witnesses of these events, and so is the Holy Spirit whom God has given to those who obey him.”
 Deuteronomy 3:11 Only King Og of Bashan was left of the remaining Rephaites. (It is noteworthy that his sarcophagus was made of iron. Does it not, indeed, still remain in Rabbath of the Ammonites? It is thirteen and a half feet long and six feet wide according to standard measure.)
 Acts 10:39 We are witnesses of all the things he did both in Judea and in Jerusalem. They killed him by hanging him on a tree, 40 but God raised him up on the third day and caused him to be seen, 41 not by all the people, but by us, the witnesses God had already chosen, who ate and drank with him after he rose from the dead.
 ‘It required a robust faith to undertake a journey of four months, cumbered with women and children, and the valuable vessels of the temple, lying through a country infested with robbers and enemies of the Jews, without making every possible arrangement for protection. But theirs was not a blind faith. God would not be pleased with such.’, Roberts, ‘Sunday Morning at the Christadelphian Ecclesia’, The Christadelphian (54.633.109), 1917; Roberts is referring to the Jewish exiles who returned to Israel after the Babylonian captivity.
 ‘In other words we rightly endeavour, as the early brethren did, to find the real meaning behind the English words we read and so come to the true message of God for man. This approach marks us as distinct from Fundamentalists; it has, I believe, always commended itself to people of reason who are not prepared to follow a blind faith.’, Draper, ‘Fundamentalism’ (letter to the editor), The Christadelphian (121.1437.109), 1984.
 ‘But Bible faith is not blind faith. We are given more than sufficient evidence to prove that Christ was raised from the tomb.’, Cresswell, ‘Proving the Resurrection of Christ’ The Christadelphian (137.1634.296), 2000.
 ‘In addition to the refutations of calumnies and the presentation of Christianity as a rational faith the Apologists were also concerned withthe questionings of thoughtful men.’, Barnard, ‘Justin Martyr: His life and thought’, p. 3 (1967).
 ‘According to the early Fathers, science and Christian doctrine were to be developed side by side, each on independent grounds, and each in harmony with the other.’, Mahan, ‘A Critical History of Philosophy’, volume 1, p. 483 (2003).
 ‘Paul begins with prophecy, which is the first proof that our faith is rational, for believers prophesied when they received the spirit.’, Ambrosiaster, in Bray (ed.), ‘Commentaries on Romans and 1-2 Corinthians’, p. 96 (2009).
 ‘For Aquinas faith is rational; it involves, like all knowing, the assent of the intellect. And reason can demonstrate the truth of some theological propositions.’, Hicks, ‘The Journey So Far: Philosophy Throuth the Ages’, p. 201 (2003).
 ‘We believe this, and that the Bible teaches thus and so. Both these propositions are topics of investigation, and the man accepting them as true, and acting them out in his life, is not justly chargeable with fanaticism. It is not “the blind faith of a fanatic” that impels him, but the resolution of a sane man who acts from the perception of the facts.’, Roberts, ‘Rejoinder to MacMillan’s Notice of “An Obscure Sect”’, The Christadelphian (27.316.369), 1890.
 Stoker, ‘Is Faith Rational?: A Hermeneutical-phenomenological Accounting for Faith’, p. 199 (2006).