Translation of the verse 30 from Surah An-Najm : Number of verses 62 - - page 527 - Part 27.
That is what they could reach of knowledge. Verily, your Lord it is He Who knows best him who goes astray from His Path, and He knows best him who receives guidance.
That is their sum of knowledge. Indeed, your Lord is most knowing of who strays from His way, and He is most knowing of who is guided.
(53:30) that *26 being the utmost of their knowledge. *27 Surely your Lord fully knows those who have strayed away from His Path and He also fully knows those who are rightly guided.
*26) This is a parenthetical sentence which has been inserted here as an explanation of the preceding verse.
*27) That is, "These people neither know nor can think anything beyond the world and its immediate gains; therefore, it is futile merely to expend time and energy on them. "