plain truth

Closest as in “closest to her heart,” or something clutched, or something unvarnished, artless, some plain truth?

Of course, the plain truth is that American Jewish comfort threatens the Zionist narrative about the horrors of exile.

The watchword of conduct that will clear up all our difficulties is, the plain truth.

For now I know,” said he, “there is no truth but the plain truth; and I am a King indeed, although my heart misgave me.

"Mr. Strong, whether you believe it or not, my brother speaks the plain truth," came from Dick.

It's the plain truth, and there is no use of your denying it.

And the last day he was here he asked me: 'Now, Alice, tell me the plain truth.