Gifts of Knowledge

From Hudhaifah, Allaah be pleased with him, who said, “Whoever would like to know if he has been inflicted with fitnah or not, then let him look and see if he views something as ḥalāl now which he used to regard as ḥarām, or if he holds something to be ḥarām which he used to hold to be ḥalāl.”
Kunnāshah al-Bairūtī, vol. 1, p. 11.