Allah commands His Prophet , the chief of the Messengers, to convey the news of being guided to Allah's straight path. This path is neither wicked, nor deviant,
دِينًا قِيَمًا
(a right religion...) that is, established on firm grounds,
In the first verse it has been said: قُلْ إِنَّنِي هَدَانِي رَبِّي إِلَىٰ صِرَاطٍ مُّسْتَقِيمٍ (As for me, my Lord has guided me to a straight path). The hint given here is that he has not taken this path prompted like them by their own ideas or under the weight of ancestral customs. Instead of that, this is a way to which he has been directed by his Lord. Then, by using the word: رَبّ (Rabb, the essential nurturer, benefactor and carer under all conditions, unfortunately not expressed through any equivalent in English), it was indicated that it is the very dictate of His beneficence that He guides to the right path. Those who look for guidance will have guidance from Him.
In the pages of the Quran, God has revealed His religion in the uncorrupted state in which He had given it to Abraham and other prophets. Now, one who wants to be blessed by the Grace of God and His support should adopt this religion. He should dedicate his prayers to God; he should have a relation with God at the level of sacrifice; if he lives, he should live for the sake of God, and when he is overtaken by death, he should by that time have unreservedly become a subject of God, in body and soul. The vast universe with its heavenly bodies follows this religion of obedience to God. Then, how can a man adopt a path other than this? In the world of obedience to God, how can arrogance directed against God lead to success? This is a matter which concerns every individual. Nobody can share another’s reward or suffer another’s punishment. The individual should be as serious about this as he is about all matters which concern him personally.
Uthmani text of the Madinah mushaf (King Fahd Complex). Translation: Saheeh International. Tafsir via Quran.com.