Professor Ansarian:
Advice is of the best human traits and virtues. According to some linguists and terminologists the most comprehensive literal translation of the word advice is benevolence. It is worth noting that many people think that advising means to preach and ask people to do good deeds and disobey evils while this conception, to some extent is wrong because giving sermons and preaching people is only one example of Advice- that is the behavioral example.
Prophet Muhammad (PBUH) said about the position of preacher before Almighty Allah:
«اِنَّ اَعْظَمَ النَّاسِ مَنْزِلَةً عِنْدَ اللّهِ یوْمَ الْقِیامَةِ اَمْشاهُمْ فِی اَرْضِهِ بِالنَّصِیحَةِ لِخَلْقِهِ؛
Indeed, the most dignified people in front of Allah at the Day of Resurrection is one who has been struggling most in the Benevolence of the people. "
source : erfan.ir