“Blind faith”. I’ve heard atheists use the term as an insult to Christian opponents – “I believe in science and not blind faith like you.” Surprisingly, I’ve heard some Christians use it almost as a badge of honor that they had such complete blind faith. So what is the biblical perspective on faith? Is it really “believing something strongly in spite of a preponderance of evidence to the contrary” as atheists would claim? Is it a step into the unknown, taking God at His word, so to speak, with no reason whatsoever, as some Christians would claim? Or is there another option? What does the Bible itself say?
Hebrews 11:1 is the most famous definition of faith in the Bible: “Now faith is the assurance of things hoped for, the conviction of things not seen.” Here, and in most other places translated as “faith”, the Greek word used is πίστις (pistis) or one of its related forms. This word can be translated as faith, belief, trust, confidence, or proof. Looking at secular Greek sources, Herodotus used it to refer to a pledge or military oath. Other secular authors such as Aeschylus, Democritus, and Appian used the word to denote evidence from the senses or from eyewitness testimony, or proof of intent deduced from observed actions . The Alexandrian Jewish philosopher Philo used the term pistis in his writings 156 times with the sense of evidence in over 50% of those instances . Aristotle used the term to describe various “proofs” for convincing someone of your case through reason and logic . This word for faith sounds like it was often used by secular sources as a justified belief based on observation, logical or philosophical reasoning, or testimony and solemn oaths. But we can dig a little deeper yet. The word pistis is derived from the Greek word πείθω (peitho), meaning “to persuade”. Are you persuaded blindly by any assertion you hear, or by evidence, by sound reasoning,and by common sense? It makes sense then that Aristotle would use pistis to describe the proofs of the art of rhetoric (persuasion). It seems that Biblical faith is anything but blind. Rather, it is “God’s divine persuasion” . It is also interesting that the word translated in Hebrew 11:1 as “conviction” in the NASB translation is ἔλεγχος (elegchos) which means proof, and is derived from ἐλέγχω (elegcho), a verb meaning “to convince with solid, compelling evidence; to expose, refute or prove wrong.”  Faith could be said to be God’s divine persuasion of the reality of the supernatural things we can’t observe with our natural senses.
So then, if our faith is more of an evidentially persuaded trust by definition, are there any supporting passages to confirm that is what biblical writers like Paul understood when using words like pistis and elegchos? Below is a partial list of supporting passages.
“Teacher, which is the great commandment in the Law?” And he [Jesus] said to him, “You shall love the Lord your God with all your heart and with all your soul and with all your mind. This is the great and first commandment.” Matthew 22:37-38
“And because of His words, many more became believers. They said to the woman, ‘We no longer believe just because of what you said; now we have heard for ourselves, and we know that this man really is the Savior of the world.’” John 4:41-42 (NIV)
“ To these He also presented Himself alive after His suffering, by many convincing proofs, appearing to them over a period of forty days and speaking of the things concerning the kingdom of God.” Acts 1:3 (NASB)
“ But examine everything carefully; hold fast to that which is good…” 1 Thessalonians 5:21 (NASB)
“Beloved, do not believe every spirit, but test the spirits to see whether they are from God, because many false prophets have gone out into the world. 1 John 4:1 (NASB)
We are to love God with all that we are, including our mind. Jesus repeatedly appealed to the evidence He presented to people, not the least of which was Him being alive after being scourged, crucified, and having a spear run through His chest. Paul tells us to examine everything carefully, while John urges discernment specifically in spiritual matters. In the end, I have to say that we don’t check our brains at the church door, and if we do, we’re not following the example set before us in Scripture. For while blind faith in the truth may still benefit us, it is an accidental benefit that could just as easily be a blind faith in error (such as cults). Thorough, honest investigation only destroys faith in error; but it only builds faith in what is true.
 The Histories, Book 3, Chapter 8, Herodotus. Viewable in English or Greek at The Perseus Project.
 Pistis as “Ground for Faith” in Hellenized Judaism and Paul, David M. Hay, Journal of Biblical Literature, 1989, 3rd Quarter, p. 461.
 ibid. p.463.
 Rhetoric, Aristotle, Book 1, Chapter 1:3, 4th century BC, Kindle Edition. The word pistis or one of its forms is translated as “proof” here and throughout the rest of the 3 books.
 Biblehub.com word study of pistis (Strong’s #4102).
 ibid, word study of elegchos (Strong’s #1650).