Is faith in God the same thing as trusting God?

Key facts

• The core senses of pistis include trust, confidence and reliance, and the word also means faithfulness or reliability. [BDAG, s.v. πίστις]
• In Romans 3:3 the phrase τὴν πίστιν τοῦ θεοῦ means "the faithfulness of God", showing pistis in the sense of reliability. [Romans 3:3, NA28]
• In Galatians 5:22 pistis appears in the list of the fruit of the Spirit, where many translations render it "faithfulness". [Galatians 5:22, NA28; NIV]
• In secular Greek before and during the first century, pistis described trust between parties in military, legal and commercial relationships. [Morgan 2015]
• English "faith" comes through Anglo-Norman from Latin fides; English "trust" comes from Old Norse. [Oxford English Dictionary, s.v. "faith", "trust"]
• In the Septuagint, Genesis 15:6 renders Hebrew he'emin (from aman) with ἐπίστευσεν, "believed", and Paul quotes that Greek wording in Romans 4:3. [LXX Genesis 15:6; Romans 4:3, NA28]
• In the Septuagint, batach is usually rendered with forms of peithō ("to be confident, to trust") or elpizō ("to hope") rather than pisteuō. Proverbs 3:5 reads ἴσθι πεποιθώς, "be trusting". [TDNT, s.v. πιστεύω; LXX Proverbs 3:5]
• Matthew W. Bates argues that pistis in key gospel contexts is better rendered "allegiance" than "belief". [Bates 2017]

Key terms

pistis πίστις

trust, reliance, confidence; also faithfulness, reliability

pisteuō πιστεύω

to trust, to believe; the verb of the pistis word group

pistos πιστός

faithful, trustworthy; or trusting, believing

fides (Latin)

trust, good faith, loyalty; the Latin rendering of pistis and the source of English 'faith'

aman אמן

to be firm, reliable; in the hiphil form he'emin, to believe or trust (Genesis 15:6)

batach בָּטַח

to trust, to rely on, to feel secure (Proverbs 3:5)

peithō πείθω

to persuade; in the perfect, to be confident or to trust; a frequent Septuagint rendering of batach

Explanation

The same word group

Greek used one family of words where English needs several. Pistis can be translated "faith", "trust", "confidence" or "faithfulness" depending on context. Pisteuō can be "believe" or "trust". Pistos can mean "faithful", "trustworthy" or "believing". An English reader who sees "faith" in one verse and "trust" in another may assume two ideas. A Greek reader would often have seen one word. The Weight of God states the lexical point directly: "The lexicons define pistis as trust, reliance, and entrusting oneself to another in complete confidence."

Where English parted the words

The difference between "faith" and "trust" is largely a product of English history. "Faith" came from Latin fides, which itself once meant trustworthiness and good faith in Roman law and society. Over centuries in English, "faith" came to mean a religion ("the Christian faith"), a set of doctrines, or a belief held without proof. "Trust" never acquired those religious associations and still means relying on someone. The Weight of God (Chapter 5) traces this narrowing and argues that, today, faith "has become the word you use when you don't have evidence". The related page on how "believe" changed traces the same history in more detail.

Trust in someone

Biblical trust has an object. Pistis in the New Testament is not a general optimism or a confident temperament. It is reliance on God, and in the gospels and letters, on Jesus. This is why the New Testament often uses pisteuō with a person as object: believing into or upon him. The worth of trust depends on the reliability of the one trusted. That is why the same word can describe both sides of the relationship: the trust of the person relying (pistis as faith) and the reliability of God (pistis as faithfulness; God as pistos).

The Hebrew background

The Old Testament uses several words in this area. Aman means to be firm or reliable; its hiphil form, he'emin, means to believe or trust, as in Genesis 15:6. Batach means to trust or feel secure, as in Proverbs 3:5. In the Septuagint, the Greek translation of the Hebrew Bible, he'emin is regularly rendered with pisteuō, while batach is usually rendered with other verbs, such as peithō and elpizō. So pistis is not a direct equivalent of every Hebrew trust word, though the ideas overlap closely. The Weight of God describes aman as recognising that something is reliable and batach as resting on it. It argues that the New Testament's pistis carries the whole Hebrew picture. That is a theological summary rather than a claim about Septuagint vocabulary.

Trust and allegiance

Some scholars argue that "trust" is still too thin. Matthew W. Bates proposes "allegiance", stressing loyalty to Jesus as king. The Weight of God lists Bates among its sources and notes that the two approaches differ in their image but agree that faith has been wrongly reduced to mental agreement: "The frameworks differ in metaphor but converge on diagnosis."

Common misunderstandings

• "Faith is believing; trust is relying. They are different things." Correction: in the New Testament both translate the same word group. The real distinction is between believing that a statement is true and trusting a person.
• "Faith means believing without evidence, so it can't be the same as trust." Correction: pistis was the ordinary word for trust between people, given on the basis of a track record. The "without evidence" sense is a later English development.
• "Trust is a feeling." Correction: in Greek and Hebrew usage, trust is reliance shown by what a person rests on and acts on, not only an inner sensation.
• "Every Hebrew word for trust was translated pistis." Correction: the Septuagint mostly uses pisteuō for aman forms, and other verbs for batach. The ideas overlap even where the vocabulary differs.

What the book argues

The Weight of God argues that "faith" and "believe" have been "drained of their meaning" in English, while the Greek word behind them is "all about weight" (Chapter 1). It defines pistis in its Key Terms as "structural weight-bearing reliance on a person assessed as reliable", which is close to the full sense of English "trust". The book is open that its weight image is interpretive: "Weight transfer is my metaphor for what that looks like when you stop abstracting it and start living it." (Chapter 5). Chapter 4 adds the Hebrew order: aman, recognising that someone is reliable, then batach, resting on them. The book's distinctive claim is not that faith equals trust, which the lexicons already support. It is that trust in its full, weight-bearing sense is what the New Testament means, and that the English word "faith" has come to obscure this.

In the book: Chapter 5: The Drift; Chapter 3: Believe; Chapter 4: Childlike Faith; Chapter 1: The Question.

Sources

1. Arndt, William F., F. Wilbur Gingrich, Frederick W. Danker and Walter Bauer. A Greek-English Lexicon of the New Testament and Other Early Christian Literature, 3rd edn (BDAG). Chicago: University of Chicago Press, 2000. Entries for πίστις, πιστεύω, πιστός.
2. Brown, Francis, S. R. Driver and Charles A. Briggs. A Hebrew and English Lexicon of the Old Testament (BDB). Oxford: Clarendon Press, 1907. Entries for אָמַן, בָּטַח.
3. Kittel, Gerhard and Gerhard Friedrich, eds. Theological Dictionary of the New Testament (TDNT), vol. 6. Grand Rapids: Eerdmans, 1968. Article πιστεύω κτλ. (R. Bultmann and A. Weiser).
4. Morgan, Teresa. Roman Faith and Christian Faith: Pistis and Fides in the Early Roman Empire and Early Churches. Oxford: Oxford University Press, 2015.
5. Bates, Matthew W. Salvation by Allegiance Alone: Rethinking Faith, Works, and the Gospel of Jesus the King. Grand Rapids: Baker Academic, 2017.
6. Oxford English Dictionary. Oxford: Oxford University Press. Entries "faith", "trust".
7. Septuagint (LXX), Genesis 15:6; Proverbs 3:5. Novum Testamentum Graece, Nestle-Aland 28th edn (NA28). New International Version (NIV).
8. Wong, Matthew. The Weight of God: How to Believe. Australia, 2026. ISBN 978-1-7646297-3-7. Chapters 1, 3, 4 and 5; Key Terms; Sources.