فَلَا تَهِنُوا وَتَدْعُوا إِلَى السَّلْمِ (So, do not lose heart, and do not appeal - 47:35". This verse prohibits the Muslims to invite the infidels to enter into peace treaty. But on another occasion in the Qur'an such a treaty is allowed: وَإِن جَنَحُوا لِلسَّلْمِ فَاجْنَحْ لَهَا And if they tilt towards peace, towards it..." (8:61). This verse indicates that if the infidels want peace, it is permissible to enter into peace agreement with them. Therefore, some scholars think that the permission in this verse is conditional upon the assumption that the infidels take initiative for peace negotiations. The current verse prohibits the Muslims from taking initiative for peace. Thus there is no conflict between the two verses. However, the authentic ruling is that it is permissible for Muslims even to take initiative in negotiating peace with the infidels if it could be in the best interest of the Muslims - not by reason of cowardice and involvement in a life of luxury. The Qur’ an by the employment of the imperative sentence fala-tahinu [ do not lose heart ] in this verse indicates that the prohibition is meant for such an appeal for peace that is based on cowardice and escaping from Jihad. In this case too there is no conflict between the two verses, because the direction of tending to peace in verse 9:61 is restricted to a situation where it is based on the interest of the Muslims, and not on cowardice or leisure. Allah knows best.
وَلَن يَتِرَكُمْ أَعْمَالَكُمْ (...and He will never deprive you of your deeds...47:35) It means that Allah will not diminish the reward of the believers. This indicates that if they were to suffer any pain or loss in this world, they wi11 receive a huge reward in the next world. Thus a believer is never unsuccessful even in the face of pain or difficulty.