take (something) on faith
To accept something without further verifying or investigating, based on trust. You're right to be wary, but, in this case, I think we can take John's statement on faith. He has no reason to lie to us.
Farlex Dictionary of Idioms. © 2024 Farlex, Inc, all rights reserved.
on faith, take it
Trust, accept without proof, as in I have no firm evidence that Bob's responsible for the errors-you'll just have to take it on faith . This idiom employs faith in the sense of "belief or confidence in something," a usage dating from about 1300.
The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.