تفسير Tazkirul Quran: سورة البلد، الآية 18

God has commanded man to scale two heights—one is to treat others with justice, and help them in their hour of need. The other is to have firm faith in God. When such belief enters the inner depths of a human being, it does not remain confined to his own thinking but rather makes him become communicative. He then attempts to lead others along the path of Truth which he himself has adopted.