[13].Surah Ar-Ra'd [The Thunder] : Ayat 18

Ayat 18. For those who answered their Lord's Call [believed in the Oneness of Allah and followed His Messenger Muhammad  [SAWW](PBUH) i.e. Islamic Monotheism] is Al-Husna (i.e. Paradise). But those who answered not His Call (disbelieved in the Oneness of Allah and followed not His Messenger Muhammad  [SAWW](PBUH), if they had all that is in the earth together with its like, they would offer it in order to save themselves (from the torment, it will be in vain). For them there will be the terrible reckoning. Their dwelling place will be Hell; - and worst indeed is that place for rest.  

Hazrat Abu Umamah Al-Bahili (May Allah be pleased with him) reported: Messenger of Allah  [SAWW](PBUH) said, "I guarantee a house in Jannah for one who gives up arguing, even if he is in the right; and I guarantee a home in the middle of Jannah for one who abandons lying even for the sake of fun; and I guarantee a house in the highest part of Jannah for one who has good manners.'' [Abu Dawud Hadith # 4800]. 

Lesson : as mentioned above in Surah Ar-Ra'd Ayat 18. "For those who answered their Lord's Call is Al-Husna (i.e. Paradise). Withdrawal from one's right in order to end a dispute is a manly act of great merit. Likewise, this Hadith tells us that a man should avoid telling a lie even in a light vein. If he gives great importance to the rules of the Shari`ah (Islamic Law) and the Commandments of Allah and His Prophet  [SAWW](PBUH), he will definitely refrain from telling a lie even in a chat session or just for the sake of joke. Usually, people don't mind if one tells a lie in a jocular mood, rather some will perhaps approve it. Yet, Allah disapproves of even the harmless or trivial form of falsehood and commands His slaves to keep away from it. From all considerations, however, moral excellence carries immense weight. Because no wrong or evil thing can be shunned without it. In other words, moral excellence surpasses all forms of goodness.