قَيِّمًا(He has made it) straight,meaning straightforward,لِّيُنذِرَ بَأْسًا شَدِيدًا مِن لَّدُنْهُto give warning of a severe punishment from Him,meaning, to those who oppose His Prophet and disbelieve in His Book, He issues a warning of severe punishment hastened in this world and postponed to the world Hereafter.مِن لَّدُنْهُ (from Him).means, from Allah. For none can punish as He punishes and none is stronger or more reliable than Him.وَيُبَشِّرَ الْمُوْمِنِينَand to give good news to the believers,means, those who believe in this Qur'an and confirm their faith by righteous actions.الَّذِينَ يَعْمَلُونَ الصَّالِحَاتِwho do righteous deeds,أَنَّ لَهُمْ أَجْرًا حَسَنًاthat they shall have a fair reward. means, a beautiful reward from Allah.