Here Allah commands His servants to have Taqwa of Him, worshipping Him as if they can see Him, and to

[قَوْلاً سَدِيداً]

(speak (always) the truth.) meaning, to speak in a straightforward manner, with no crookedness or distortion. He promises them that if they do that, He will reward them by making their deeds righteous, i.e., enabling them to do righteous deeds, and He will forgive them their past sins. With regard to whatever sins they may commit in the future, He will inspire them to repent from them. Then He says:

[وَمَن يُطِعِ اللَّهَ وَرَسُولَهُ فَقَدْ فَازَ فَوْزاً عَظِيماً]

(And whosoever obeys Allah and His Messenger, he has indeed achieved a great victory.) meaning, he will be saved from the fire of Hell and will enjoy everlasting delights (in Paradise).

[إِنَّا عَرَضْنَا الاٌّمَانَةَ عَلَى السَّمَـوَتِ وَالاٌّرْضِ وَالْجِبَالِ فَأبَيْنَ أَن يَحْمِلْنَهَا وَأَشْفَقْنَ مِنْهَا وَحَمَلَهَا الإِنْسَـنُ إِنَّهُ كَانَ ظَلُوماً جَهُولاً - لِّيُعَذِّبَ اللَّهُ الْمُنَـفِقِينَ وَالْمُنَـفِقَـتِ وَالْمُشْرِكِينَ وَالْمُشْرِكَـتِ وَيَتُوبَ اللَّهُ عَلَى الْمُؤْمِنِينَ وَالْمُؤْمِنَـتِ وَكَانَ اللَّهُ غَفُوراً رَّحِيماً ]

(72. Truly, We did offer the Amanah to the heavens and the earth, and the mountains, but they declined to bear it and were afraid of it. But man bore it. Verily, he was unjust and ignorant.) (73. So that Allah will punish the hypocrites, men and women, and the men and women who are idolators. And Allah will pardon the believers, men and women. And Allah is Ever Oft-Forgiving, Most Merciful.)