Allah's Apostle said, "The deeds of anyone of you will not save you (from the (Hell) Fire)." They said, "Even you (will not be saved by your deeds), O Allah's Apostle?" He said, "No, even I (will not be saved) unless and until Allah bestows His Mercy on me. Therefore, do good deeds properly, sincerely and moderately, and worship Allah in the forenoon and in the afternoon and during a part of the night, and always adopt a middle, moderate, regular course whereby you will reach your target (Paradise)."
( Sahih Al-Bukhari, Volume 8, Book 76, Number 470 )
Those two verses above really we need when we want to advise people to the truth. How many cases we found when someone advises others but in the rude and impolite manner, the result is not getting a better solution but making new worse problems.
We hope by advising people by saying and acting in a wise and good manner, God will love us. How lucky people who Allah loves... can't write with millions words. Remember Al-Hadits below :
Chapter 46 : WHEN ALLAH LOVES A SERVANT, HIS FELLOW-SERVANTS ALSO BEGIN TO LOVE HIM :