Getting highest achievement according to the Quran

70. O you who believe! Keep your duty to Allah and fear Him, and speak (always) the truth.
71. He will direct you to do righteous good deeds and will forgive you your sins. And whosoever obeys Allah and His Messenger (??? ???? ???? ????), he has indeed achieved a great achievement (i.e. he will be saved from the Hell-fire and will be admitted to Paradise).

Quran (Surah Al-Ahzab, Verses 70-71)