sentence1: If anyone desires to do his will, he will know about the teaching, whether it is from God or if I am speaking from myself.
sentence2: وَمَنْ أَرَادَ أَنْ يَعْمَلَ مَشِيئَةَ اللهِ يَعْرِفُ مَا إِذَا كَانَ تَعْلِيمِي مِنْ عِنْدِ اللهِ، أَوْ أَنَّنِي أَتَكَلَّمُ مِنْ عِنْدِي.