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act of faith

act of faith

5 6.8
An action or decision you make because you trust something without proof
  • noun
translation icon : acto de fe
  • Just staying alive is an act of faith.
  • make an act of faith

But I think it starts with an act of faith.

Examples

  • It's gonna take a tremendous act of faith on your part, but you've got to hear me out.

  • Mathematics involves an act of faith—one perhaps rather easy to make.

    Academic text (1991)
  • Every day of freedom is like an act of faith.

  • Building this town is an even bigger act of faith.

  • My dear John, I consider the responsibility of keeping you alive to be an act of faith, of love and, indeed, of friendship.

  • We are all gathered here in an act of faith.

  • Fellowship grants are an act of faith in the talent and vision of an individual artist.

    Academic text (1993)
  • Whether you're suspicious-minded or not, in the end, the whole thing is an act of faith.

    Fiction book (1995)
  • "For those who cannot follow the mathematics, belief in the Higgs is an act of faith, not of rationality."

    Blog text (8)
  • Every day of freedom is like an act of faith.

Synonyms

leap of faith
vsact of faith
  • Informal
27 6.1

Doing something risky because you believe it will work

is a decision made from trust without proof or need for courage

Antonyms

124 5.1

A feeling of doubt about an idea or claim when there is not enough proof

How Certain

certainty
  • Literature
202 3.4
belief
1.1
act of faith
5 6.8
guess
768 1.0

Surface Forms

act of faith singular
acts of faith plural

Morphology

act + of + faith

The phrase combines 'act' (a deed) with 'faith' (trust or belief) in a straightforward compositional way: an action motivated by faith. This is a common noun + of + noun pattern found across languages, so a B1 learner who knows the constituents would very likely infer the intended meaning.

Etymology

Act of faith comes from religious life, where someone made a clear act, like lighting a candle or making a vow, to show their faith even when there was no proof. So today act of faith means 'an action you take because you trust or believe, not because you know for sure'.