[16].Surah An-Nahl [The Bees] : Ayat 30-31

Ayat 30. And (when) it is said to those who are the Muttaqun (pious) "What is it that your Lord has sent down?" They say: "That which is good." For those who do good in this world, there is good, and the home of the Hereafter will be better. And excellent indeed will be the home (i.e. Paradise) of the Muttaqun (pious).  
31. 'Adn (Eden) Paradise (Gardens of Eternity) which they will enter, under which rivers flow, they will have therein all that they wish. Thus Allah rewards the Muttaqun (pious). 

Hazrat Abu Hurairah (May Allah be pleased with him) reported: The Messenger of Allah  [SAWW](PBUH) said, "The religion (of Islam) is easy, and whoever makes the religion a rigour, it will overpower him. So, follow a middle course (in worship); if you can't do this, do something near to it and give glad tidings and seek help (of Allah) at morning and at dusk and some part of night". [Al-Bukhari Vol 01, Chapter 02, Hadith # 38]. 

Lesson : as mentioned above in Surah An-Nahl Ayat 30.They say: "That which is good." For those who do good in this world, there is good, 

It mentions the refined character and compassion of the Prophets which has an important lesson for those who preach righteousness. They should be always prepared to face hardships involved in inviting people to the right path and, instead of retaliation, forgive their audience and pray for their guidance. These noble qualities are extremely important for those who are devoted to preach religion.