take something on faith
accept on faith
on faith

I would not ask him to take me on faith.

The results were expected to be taken on faith alone.

So you kind of have to take it on faith.

But American public opinion will not take foreign policy on faith.

Still, there would be no point in taking too much on faith.

Maybe some things just had to be taken on faith.

And an administration that wants to be taken on faith.

We are asked to take the President's policy on faith.

The others, I knew, would rather have had to take something on faith.

The public will have to take the result on faith.