What is the criterion in the prayer for guidance (istikharah)?

The questioner : Regarding istikharah, Honorable Shaykh, is the criterion the psychological comfort that a person feels? Whether Allah does not decree it, or Allah the Exalted decrees it. He decreed it after the prayer for guidance toward good. But the one seeking guidance remained in hesitation, so they repeated the prayer for guidance.

The Shaykh : May Allah reward you with good. Thank you to the sister who called in.