To “know, ” says one reference, here means also to have appreciation because“ what is ‘ known ’ is of value or importance to the one who knows. ”
لِذلِكَ ٱسْأَلْ نَفْسَكَ :‏ ‹ هَلْ أَعْرِفُ ٱلْحَقَّ فِعْلًا ؟‏