see for yourself

see for (oneself)

To see or experience something firsthand as a means of proving to oneself that it is true or accurate. A: "Restarting the computer didn't fix the issue?" B: "See for yourself! It just keeps getting stuck." I couldn't believe that his car could actually park automatically, so I had to go over and see for myself.
See also: for, see
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

ˌsee for yourˈself

see or experience something yourself so that you will believe it is true: Don’t you believe she’s here? Well, come in and see for yourself.
See also: for, see
Farlex Partner Idioms Dictionary © Farlex 2017
See also:
References in classic literature ?
See for yourself!" She looked round at him again with a ghastly gayety; and returned, with a desperate assumption of indifference, to the subject of Lady Janet's nephew.
(Try overlapping beams from flashlights covered with color filters to see for yourself).