Who are the people that accept the true lesson and follow accordingly?

 

Answer:
 

Verse 51 of Chapter 6

Give this warning to those in whose (hearts) is the fear that they will be brought (to judgment) before their Lord: except for Him they will have no protector nor intercessor: that they may guard (against evil). Verse 18 of Chapter 35

No bearer of a burden will bear another's burden, and if a laden soul cries out for help, none will come forward to share the least of its burden, even though it be the nearest kinsman. (O Prophet,) you can only warn those who fear their Lord though they cannot see Him, and establish the regular Prayer. Whoever adopts purity does so for his own good, and to Allah shall all return.

Verses 27-28 of Chapter 35
Do you not see that Allah sends down rainwater from the sky and we bring forth thereby a variety of fruits of different colors? In the mountains also there are streaks, white and red and black, with different hues. And likewise, men, beasts and cattle also have different colors. The fact is that only those of His servants, who possess knowledge, fear Allah. Surely, Allah is All-Mighty, All-Forgiving.

Verse 18 of Chapter 39

Those who listen to the word, then follow the best of it; those are they whom Allah has guided, and those it is who are the men of understanding.


Comments: Only those of the people who have the real knowledge, as reflected by their unique nature of listening to what every one says and whole-heartedly (without the influences of any prejudice and pride) accepting only what is right and true, fear the  Lord of the universe and whoever fears Him honestly are likely to be guided to the right path.